1
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Crescentini LD, Favi G, Mari G, Ciancaleoni G, Costamagna M, Santeusanio S, Mantellini F. Experimental and Theoretical DFT Investigations in the [2,3]-Wittig-Type Rearrangement of Propargyl/Allyl-Oxy-Pyrazolones. Molecules 2021; 26:6557. [PMID: 34770965 PMCID: PMC8587800 DOI: 10.3390/molecules26216557] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/21/2021] [Accepted: 10/26/2021] [Indexed: 11/16/2022] Open
Abstract
Here we report the synthesis of interesting 3-alkyl-4-hydroxy-1-aryl-4-(propa-1,2-dienyl)1H-pyrazol-5(4H)-ones and 9-alkyl-7-aryl-1-oxa-7,8-diazaspiro[4.4]nona-3,8-dien-6-ones, starting from 1,2-diaza-1,3-dienes (DDs) and propargyl alcohol. The reaction proceeds through a sequence Michael-type nucleophilic attack/cyclization/[2,3]-Wittig rearrangement. In the same way, the reaction between the aforementioned DDs and allyl alcohol furnished 4-allyl-4-hydroxy-3-alkyl-1-aryl-1H-pyrazol-5(4H)-ones. A DFT study was also carried out, in order to have decisive clarifications about the mechanism.
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Affiliation(s)
- Lucia De Crescentini
- Department of Biomolecular Sciences, Section of Organic Chemistry and Organic Natural Compounds, University of Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino, PU, Italy; (G.F.); (G.M.); (S.S.)
| | - Gianfranco Favi
- Department of Biomolecular Sciences, Section of Organic Chemistry and Organic Natural Compounds, University of Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino, PU, Italy; (G.F.); (G.M.); (S.S.)
| | - Giacomo Mari
- Department of Biomolecular Sciences, Section of Organic Chemistry and Organic Natural Compounds, University of Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino, PU, Italy; (G.F.); (G.M.); (S.S.)
| | - Gianluca Ciancaleoni
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124 Pisa, PI, Italy; (G.C.); (M.C.)
| | - Marcello Costamagna
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124 Pisa, PI, Italy; (G.C.); (M.C.)
| | - Stefania Santeusanio
- Department of Biomolecular Sciences, Section of Organic Chemistry and Organic Natural Compounds, University of Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino, PU, Italy; (G.F.); (G.M.); (S.S.)
| | - Fabio Mantellini
- Department of Biomolecular Sciences, Section of Organic Chemistry and Organic Natural Compounds, University of Urbino “Carlo Bo”, Via I Maggetti 24, 61029 Urbino, PU, Italy; (G.F.); (G.M.); (S.S.)
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2
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Bhattacharya A, Shukla PM, Maji B. Highly Selective and Catalytic C-N Bond Cleavage of Tertiary Sulfonamides: Scope and Mechanistic Insight. ACS OMEGA 2021; 6:18988-19005. [PMID: 34337238 PMCID: PMC8320137 DOI: 10.1021/acsomega.1c02276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
A highly chemoselective C-N bond cleavage reaction of p-methoxybenzyl- (PMB), 3,4-dimethoxybenzyl- (DMB), or cinnamyl-substituted tertiary sulfonamides in the presence of catalytic Bi(OTf)3 is presented. A wide range of sulfonamide substrates smoothly furnished the corresponding C-N bond cleavage products in good to excellent yields. Great efforts have been made to obtain insights into the reaction mechanism based on a series of control experiments and mass spectroscopy.
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3
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Rani S, Dash SR, Bera A, Alam MN, Vanka K, Maity P. Phosphite mediated asymmetric N to C migration for the synthesis of chiral heterocycles from primary amines. Chem Sci 2021; 12:8996-9003. [PMID: 34276927 PMCID: PMC8261767 DOI: 10.1039/d1sc01217g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 05/27/2021] [Indexed: 11/21/2022] Open
Abstract
A phosphite mediated stereoretentive C-H alkylation of N-alkylpyridinium salts derived from chiral primary amines was achieved. The reaction proceeds through the activation of the N-alkylpyridinium salt substrate with a nucleophilic phosphite catalyst, followed by a base mediated [1,2] aza-Wittig rearrangement and subsequent catalyst dissociation for an overall N to C-2 alkyl migration. The scope and degree of stereoretention were studied, and both experimental and theoretical investigations were performed to support an unprecedented aza-Wittig rearrangement-rearomatization sequence. A catalytic enantioselective version starting with racemic starting material and chiral phosphite catalyst was also established following our understanding of the stereoretentive process. This method provides efficient access to tertiary and quaternary stereogenic centers in pyridine systems, which are prevalent in drugs, bioactive natural products, chiral ligands, and catalysts.
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Affiliation(s)
- Soniya Rani
- Organic Chemistry Division, CSIR-National Chemical Laboratory Pune-411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
| | - Soumya Ranjan Dash
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
- Physical and Material Chemistry Division, CSIR-National Chemical Laboratory Pune 411008 India
| | - Asish Bera
- Organic Chemistry Division, CSIR-National Chemical Laboratory Pune-411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
| | - Md Nirshad Alam
- Organic Chemistry Division, CSIR-National Chemical Laboratory Pune-411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
| | - Kumar Vanka
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
- Physical and Material Chemistry Division, CSIR-National Chemical Laboratory Pune 411008 India
| | - Pradip Maity
- Organic Chemistry Division, CSIR-National Chemical Laboratory Pune-411008 India
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4
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Gyűjtő I, Porcs-Makkay M, Szabó G, Kelemen Z, Pusztai G, Tóth G, Dancsó A, Halász J, Simig G, Volk B, Nyulászi L. Basicity-Tuned Reactivity: diaza-[1,2]-Wittig versus diaza-[1,3]-Wittig Rearrangements of 3,4-Dihydro-2 H-1,2,3-benzothiadiazine 1,1-Dioxides. J Org Chem 2021; 86:1685-1700. [PMID: 33382258 PMCID: PMC8021225 DOI: 10.1021/acs.joc.0c02512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
The base-induced (t-BuOK) rearrangement reactions
of 3,4-dihydro-2H-1,2,3-benzothiadiazine 1,1-dioxides
result in a ring opening along the N–N bond, followed by ring
closure with the formation of new C–N bonds. The position of
the newly formed C–N bond can selectively be tuned by the amount
of the base, providing access to new, pharmacologically interesting
ring systems with high yield. While with 2 equiv of t-BuOK 1,2-benzisothiazoles can be obtained in a diaza-[1,2]-Wittig reaction, with 6 equiv of the base 1,2-benzothiazine
1,1-dioxides can be prepared in most cases as the main product, in
a diaza-[1,3]-Wittig reaction. DFT calculations and
detailed NMR studies clarified the mechanism, with a mono- or dianionic
key intermediate, depending on the amount of the reactant base. Also,
the role of an enamide intermediate formed during the workup of the
highly basic (6 equiv of base) reaction was clarified. The substrate
scope of the reaction was also explored in detail.
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Affiliation(s)
- Imre Gyűjtő
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, H-1475 Budapest, Hungary.,Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, and MTA-BME Computation Driven Chemistry Research Group, Szt. Gellért tér 4, H-1111 Budapest, Hungary
| | - Márta Porcs-Makkay
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, H-1475 Budapest, Hungary
| | - Gergő Szabó
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, and MTA-BME Computation Driven Chemistry Research Group, Szt. Gellért tér 4, H-1111 Budapest, Hungary
| | - Zsolt Kelemen
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, and MTA-BME Computation Driven Chemistry Research Group, Szt. Gellért tér 4, H-1111 Budapest, Hungary
| | - Gyöngyvér Pusztai
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, H-1475 Budapest, Hungary
| | - Gábor Tóth
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, H-1475 Budapest, Hungary.,Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, and MTA-BME Computation Driven Chemistry Research Group, Szt. Gellért tér 4, H-1111 Budapest, Hungary
| | - András Dancsó
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, H-1475 Budapest, Hungary
| | - Judit Halász
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, H-1475 Budapest, Hungary
| | - Gyula Simig
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, H-1475 Budapest, Hungary
| | - Balázs Volk
- Directorate of Drug Substance Development, Egis Pharmaceuticals Plc., P.O. Box 100, H-1475 Budapest, Hungary
| | - László Nyulászi
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, and MTA-BME Computation Driven Chemistry Research Group, Szt. Gellért tér 4, H-1111 Budapest, Hungary
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5
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Li X, Li P, Wang Z, Fu H, Dai Q. Palladium-Catalyzed Intramolecular Decarboxylative Allylic Amination of Aroyloxycarbamates. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202104030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Xu Y, Chen X, Gao Y, Yan Z, Wan C, Liu JB, Wang Z. Synthesis of Trifluoromethyl- and Ester Group-Substituted α-Carbolines via Iron-Catalyzed Tandem Cyclization Reaction. J Org Chem 2020; 85:4354-4364. [PMID: 32090568 DOI: 10.1021/acs.joc.0c00048] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An efficient approach to prepare trifluoromethyl-α-carbolines and ester group-substituted α-carbolines via the tandem cyclization reaction of 2-(2-aminophenyl)acetonitriles and trifluoromethyl 1,3-diones or β,γ-unsaturated α-ketoesters was reported. The transformation proceeded smoothly in the presence of catalytic environmental-benign iron salts, which are used to prepare the desired products in moderate to good yields.
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Affiliation(s)
- Yumin Xu
- College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
| | - Xiaoqian Chen
- College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
| | - Yiqin Gao
- College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
| | - Zicong Yan
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Changfeng Wan
- College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
| | - Jin-Biao Liu
- College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China.,School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Zhiyong Wang
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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7
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Kato N, Miyagawa S, Nomoto H, Nakayama M, Iwashita M, Ueda M. A scalable synthesis of (+)-coronafacic acid. Chirality 2020; 32:423-430. [PMID: 31999008 DOI: 10.1002/chir.23172] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/15/2019] [Accepted: 12/18/2019] [Indexed: 01/17/2023]
Abstract
A facile, efficient, and scalable synthesis of optically pure coronafacic acid by resolution of racemic coronafacic acid obtained using an improved version of Watson's method has been developed. By optimizing the boron-mediated aldol reaction of Watson, we were able to prepare 2.1 g of racemic coronafacic acid. This was coupled with (S)-4-isopropyl-2-oxazolidinone to give a mixture of diastereomeric coronafacyl oxazolidinones, which were readily separable by silica-gel column chromatography to give 630 mg of optically pure (+)-coronafacic acid.
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Affiliation(s)
- Nobuki Kato
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Saki Miyagawa
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | - Haruna Nomoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Misuzu Nakayama
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Makoto Iwashita
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Minoru Ueda
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan.,Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan
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8
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Motaleb A, Rani S, Das T, Gonnade RG, Maity P. Phosphite‐Catalyzed C−H Allylation of Azaarenes via an Enantioselective [2,3]‐Aza‐Wittig Rearrangement. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Abdul Motaleb
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune- 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad- 201002 India
| | - Soniya Rani
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune- 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad- 201002 India
| | - Tamal Das
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune- 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad- 201002 India
| | - Rajesh G. Gonnade
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune- 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad- 201002 India
| | - Pradip Maity
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune- 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad- 201002 India
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9
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Motaleb A, Rani S, Das T, Gonnade RG, Maity P. Phosphite-Catalyzed C-H Allylation of Azaarenes via an Enantioselective [2,3]-Aza-Wittig Rearrangement. Angew Chem Int Ed Engl 2019; 58:14104-14109. [PMID: 31389132 DOI: 10.1002/anie.201906681] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/19/2019] [Indexed: 11/11/2022]
Abstract
A phosphite-mediated [2,3]-aza-Wittig rearrangement has been developed for the regio- and enantioselective allylic alkylation of six-membered heteroaromatic compounds (azaarenes). The nucleophilic phosphite adducts of N-allyl salts undergo a stereoselective base-mediated aza-Wittig rearrangement and dissociation of the chiral phosphite for overall C-H functionalization of azaarenes. This method provides efficient access to tertiary and quaternary chiral centers in isoquinoline, quinoline, and pyridine systems, tolerating a broad variety of substituents on both the allyl part and azaarenes. Catalysis with chiral phosphites is also demonstrated with synthetically useful yields and enantioselectivities.
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Affiliation(s)
- Abdul Motaleb
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
| | - Soniya Rani
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
| | - Tamal Das
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
| | - Rajesh G Gonnade
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
| | - Pradip Maity
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
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10
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Peng Q, Hu J, Huo J, Yuan H, Xu L, Pan X. Cp*Rh(iii) catalyzed ortho-halogenation of N-nitrosoanilines by solvent-controlled regioselective C–H functionalization. Org Biomol Chem 2018; 16:4471-4481. [PMID: 29855022 DOI: 10.1039/c8ob00601f] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A highly efficient rhodium-catalyzed, solvent-controlled regioselective C–H halogenation of anilines by using N-nitroso as a suitable and removable directing group was achieved under mild reaction conditions.
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Affiliation(s)
- Qiujun Peng
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Jian Hu
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Jiyou Huo
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Hongshun Yuan
- School of Perfume and Aroma Technology
- Shanghai Institute of Technology
- Shanghai
- China
| | - Lanting Xu
- Shanghai Research Institute of Fragrance and Flavor Industry
- Shanghai 200232
- China
| | - Xianhua Pan
- Shanghai Research Institute of Fragrance and Flavor Industry
- Shanghai 200232
- China
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11
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Roy T, Thangaraj M, Kaicharla T, Kamath RV, Gonnade RG, Biju AT. The Aryne [2,3] Stevens Rearrangement. Org Lett 2016; 18:5428-5431. [DOI: 10.1021/acs.orglett.6b02809] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tony Roy
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
| | | | - Trinadh Kaicharla
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
| | | | | | - Akkattu T. Biju
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
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12
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Zhang J, Chen ZX, Du T, Li B, Gu Y, Tian SK. Aryne-Mediated [2,3]-Sigmatropic Rearrangement of Tertiary Allylic Amines. Org Lett 2016; 18:4872-4875. [DOI: 10.1021/acs.orglett.6b02344] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Juan Zhang
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Zhi-Xiong Chen
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ting Du
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Bing Li
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yonghong Gu
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shi-Kai Tian
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
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13
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Tayama E. Ring-Substitution, Enlargement, and Contraction by Base-Induced Rearrangements of N-Heterocyclic Ammonium Salts. HETEROCYCLES 2016. [DOI: 10.3987/rev-16-837] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Tayama E, Kobayashi Y, Toma Y. Diaza [1,4] Wittig-type rearrangement of N-allylic-N-Boc-hydrazines into γ-amino-N-Boc-enamines. Chem Commun (Camb) 2016; 52:10570-3. [PMID: 27498628 DOI: 10.1039/c6cc04626f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Diaza [1,4] Wittig-type rearrangement of N-allylic-N-Boc-hydrazines into γ-amino-N-Boc-enamines was demonstrated.
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Affiliation(s)
- Eiji Tayama
- Department of Chemistry
- Faculty of Science
- Niigata University
- Niigata
- Japan
| | | | - Yuka Toma
- Department of Chemistry
- Faculty of Science
- Niigata University
- Niigata
- Japan
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