1
|
Hirokane T, Watanabe S, Matsumoto K, Yoshida M. A facile synthesis of trisubstituted allenamides by DBU-promoted isomerization of propargylamides. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
2
|
Kondoh A, Ozawa R, Terada M. Synthesis of Trisubstituted Allenamides Utilizing 1,2-Rearrangement of Dialkoxyphosphoryl Moiety under Brønsted Base Catalysis. CHEM LETT 2019. [DOI: 10.1246/cl.190489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Azusa Kondoh
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Ryosuke Ozawa
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Masahiro Terada
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| |
Collapse
|
3
|
Samanta S, Hajra A. Divergent Synthesis of Allenylsulfonamide and Enaminonesulfonamide via In(III)-Catalyzed Couplings of Propargylamine and N-Fluorobenzenesulfonimide. J Org Chem 2018; 83:13157-13165. [PMID: 30346168 DOI: 10.1021/acs.joc.8b01882] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An In(III)-catalyzed facile and controllable method for the synthesis of allenylsulfonamide and enaminonesulfonamide has been achieved by the reaction between propargylamine and N-fluorobenzenesulfonimide (NFSI) under mild conditions. The present protocol is also applicable to the synthesis of tetrasubstituted allenylsulfonamide from triphenyl propargylalcohol. Experimental results suggest that the reaction probably proceeds through the ionic pathway.
Collapse
Affiliation(s)
- Sadhanendu Samanta
- Department of Chemistry , Visva-Bharati (A Central University) , Santiniketan 731235 , India
| | - Alakananda Hajra
- Department of Chemistry , Visva-Bharati (A Central University) , Santiniketan 731235 , India
| |
Collapse
|
4
|
Yu L, Deng Y, Cao J. Regioselective Synthesis of Highly Substituted Imidazoles via the Sequential Reaction of Allenyl Sulfonamides and Amines. J Org Chem 2015; 80:4729-35. [PMID: 25853897 DOI: 10.1021/acs.joc.5b00141] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel synthesis of imidazoles from electron-withdrawing group-substituted allenyl sulfonamides with amines was developed. The 4- and 5-functionalized imidazoles were constructed regioselectively, which depended on the substituents on the nitrogen atoms.
Collapse
Affiliation(s)
- Lian Yu
- Key Laboratory of Organosilicon Chemistry and Material Technology of the Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People's Republic of China
| | - Yuan Deng
- Key Laboratory of Organosilicon Chemistry and Material Technology of the Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People's Republic of China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of the Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People's Republic of China
| |
Collapse
|
5
|
Yu L, Cao J. Synthesis of α,β-unsaturated amides and iminocoumarins from N,N-disulfonyl ynamides with aldehydes via the ketenimine intermediate. Org Biomol Chem 2014; 12:3986-90. [DOI: 10.1039/c4ob00513a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
6
|
Le Bras J, Muzart J. Palladium-catalysed inter- and intramolecular formation of C–O bonds from allenes. Chem Soc Rev 2014; 43:3003-40. [DOI: 10.1039/c3cs60379b] [Citation(s) in RCA: 127] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
This review highlights the Pd-catalysed formation of a C–O bond from allenes via the inter- or intramolecular reaction.
Collapse
Affiliation(s)
- Jean Le Bras
- Institut de Chimie Moléculaire de Reims
- UMR 7312
- CNRS - Université de Reims Champagne-Ardenne
- 51687 Reims Cedex 2, France
| | - Jacques Muzart
- Institut de Chimie Moléculaire de Reims
- UMR 7312
- CNRS - Université de Reims Champagne-Ardenne
- 51687 Reims Cedex 2, France
| |
Collapse
|
7
|
Wang XN, Hsung RP, Fox SK, Lv MC, Qi R. SYNTHESIS OF DE NOVO CHIRAL γ-AMINO-YNAMIDES USING LITHIATED YNAMIDES. OBSERVATION OF A UNIQUE 5- ENDO-DIG CYCLIZATION WITH AN INVERSION OF S-CENTER. HETEROCYCLES 2014; 88:1233-1254. [PMID: 24791059 PMCID: PMC4002055 DOI: 10.3987/com-13-s(s)88] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We describe herein details of our efforts in developing a highly stereoselective synthesis of de novo chiral γ-amino-ynamides through additions of lithiated ynamides to Ellman-Davis chiral N-tert-butanesulfinyl imines. While additions of ynamides could be highly stereoselective even without Lewis acids, the use of BF3-OEt2 completely reversed the stereoselectivity. On the other hand, additions of oxazolidinone-substituted, oxazinanone-substituted and tetrahydropyrimidinone-substituted ynamides behaved quite differently and functioned better with BF3-OEt2. The chirality of the oxazolidinone ring exerts no impact on the selectivity. This work also features a unique 5-endo-dig cyclization of oxazolidinone-substituted γ-amino-ynamides that could be promoted with acid, leading to isothiazoles and 2,3-dihydro-isothiazole S-oxides.
Collapse
|
8
|
Lu T, Lu Z, Ma ZX, Zhang Y, Hsung RP. Allenamides: a powerful and versatile building block in organic synthesis. Chem Rev 2013; 113:4862-904. [PMID: 23550917 PMCID: PMC4539064 DOI: 10.1021/cr400015d] [Citation(s) in RCA: 272] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ting Lu
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
| | - Zhenjie Lu
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
| | - Zhi-Xiong Ma
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
| | - Yu Zhang
- Discovery Research, Dow AgroSciences LLC, Indianapolis, IN 46268
| | - Richard P. Hsung
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin, Madison, WI 53705
| |
Collapse
|
9
|
Qi R, Wang XN, Dekorver KA, Tang Y, Wang CC, Li Q, Li H, Lv MC, Yu Q, Hsung RP. A Convenient Synthesis of γ-Amino-Ynamides via Additions of Lithiated Ynamides to Aryl Imines. Observation of an Aza-Meyer-Schuster Rearrangement. SYNTHESIS-STUTTGART 2013; 45:1749-1758. [PMID: 23976795 PMCID: PMC3748967 DOI: 10.1055/s-0033-1338476] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Efforts in developing an expeditious and convenient method for synthesizing γ-amino-ynamides via nucleophilic addition of lithiated ynamides to aryl imines are described. This work also features an aza-variant of a Meyer-Schuster rearrangement of γ-amino-ynamides and the synthetic utility of γ-amino-ynamides in an intramolecular ketenimine-[2 + 2] cycloaddition.
Collapse
Affiliation(s)
- Rui Qi
- School of Pharmaceutical Science and Technology, and Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Tianjin University, Tianjin 300072 P. R. China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Wang XN, Winston-McPherson GN, Walton MC, Zhang Y, Hsung RP, DeKorver KA. Synthesis of cyclopentenimines from N-allyl ynamides via a tandem aza-Claisen rearrangement-carbocyclization sequence. J Org Chem 2013; 78:6233-44. [PMID: 23718841 DOI: 10.1021/jo400960e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
We describe here details of our investigations into Pd-catalyzed and thermal aza-Claisen-carbocyclizations of N-allyl ynamides to prepare a variety of α,β-unsaturated cyclopentenimines. The nature of the ynamide electron-withdrawing group and β-substituent plays critical roles in the success of this tandem cascade. With N-sulfonyl ynamides, the use of palladium catalysis is required, as facile 1,3-sulfonyl shifts dominate under thermal conditions. However, since no analogous 1,3-phosphoryl shift is operational, N-phosphoryl ynamides could be used to prepare similar cyclopentenimines under thermal conditions through zwitter ionic intermediates that undergo N-promoted H-shifts. Alternatively, by employing ynamides bearing tethered carbon nucleophiles, the zwitter ionic intermediates could be intercepted, giving rise rapidly to more complex fused bi- and tricyclic scaffolds.
Collapse
Affiliation(s)
- Xiao-Na Wang
- Division of Pharmaceutical Sciences and Department of Chemistry, 777 Highland Avenue, University of Wisconsin, Madison, Wisconsin 53705-2222, United States
| | | | | | | | | | | |
Collapse
|
11
|
Wang XN, Hsung RP, Qi R, Fox SK, Lv MC. A highly stereoselective addition of lithiated ynamides to Ellman-Davis chiral N-tert-butanesulfinyl imines. Org Lett 2013; 15:2514-7. [PMID: 23646900 DOI: 10.1021/ol400989x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A highly diastereoselective addition of lithiated ynamides to Ellman-Davis chiral imines is described. While additions of N-sulfonyl ynamides are highly stereoselective even without Lewis acids, the use of BF3-OEt2 completely reversed the stereoselectivity. In addition, oxazolidinone-substituted ynamides behaved differently and functioned better with BF3-OEt2, and the chirality of the oxazolidinone ring exerts no impact on the selectivity.
Collapse
Affiliation(s)
- Xiao-Na Wang
- Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin , Madison, Wisconsin 53705, United States
| | | | | | | | | |
Collapse
|
12
|
Saito N, Saito K, Sato H, Sato Y. Regio- and Stereoselective Synthesis of Tri- and Tetrasubstituted EnamidesviaPalladium-Catalyzed Silaboration of Ynamides. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201201111] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
13
|
Brioche J, Meyer C, Cossy J. Synthesis of functionalized allenamides from ynamides by enolate Claisen rearrangement. Org Lett 2013; 15:1626-9. [PMID: 23496162 DOI: 10.1021/ol400402n] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The Claisen rearrangement of N-Boc glycinates derived from ynamido-alcohols affords an efficient and stereoselective access to highly functionalized allenamides. These compounds undergo silver-catalyzed cyclization to 3-pyrrolines which are useful precursors for the synthesis of substituted pyrrolidines.
Collapse
Affiliation(s)
- Julien Brioche
- Laboratoire de Chimie Organique, ESPCI Paris Tech, CNRS, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | | | | |
Collapse
|
14
|
Kong Y, Jiang K, Cao J, Fu L, Yu L, Lai G, Cui Y, Hu Z, Wang G. Synthesis of 3-Alkyl- or 3-Allenyl-2-amidobenzofurans via Electrophilic Cyclization of o-Anisole-Substituted Ynamides with Carbocations. Org Lett 2013; 15:422-5. [DOI: 10.1021/ol303474a] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Yulong Kong
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People’s Republic of China
| | - Kezhi Jiang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People’s Republic of China
| | - Jian Cao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People’s Republic of China
| | - Lingzi Fu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People’s Republic of China
| | - Lian Yu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People’s Republic of China
| | - Guoqiao Lai
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People’s Republic of China
| | - Yuming Cui
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People’s Republic of China
| | - Ziqiang Hu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People’s Republic of China
| | - Guanhai Wang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Wenyi Road 222, Hangzhou 310012, People’s Republic of China
| |
Collapse
|