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Feng M, Huang B, Jiang H, Huang L. Synthesis of γ-Thiapyrones by Diels-Alder/Retro-Diels-Alder Reaction of α-Pyrones with 5- H-1,2,3-Thiadiazoles. J Org Chem 2024; 89:5846-5850. [PMID: 38584435 DOI: 10.1021/acs.joc.3c02889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
The efficient synthesis of γ-thiapyrones by a base-mediated Diels-Alder/retro-Diels-Alder reaction of α-pyrones with 5-H-1,2,3-thiadiazoles is reported herein. Thioketenes in situ generated from thiadiazoles as electron-poor dienophile and electron-rich 4-hydroxy-2-pyrones as dienes are conjunctively transformed into a series of γ-thiapyrones with broad functional group compatibility in good to excellent yields (35 examples, 67% average yield).
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Affiliation(s)
- Mengxia Feng
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Bin Huang
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Huanfeng Jiang
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Liangbin Huang
- State Key Laboratory of Pulp and Paper Engineering, Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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2
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Zhang Y, Shi S, Yang Z. Thiourea-Mediated Stereospecific Deoxygenation of Cyanoepoxides to Access Highly Diastereopure Alkenyl Nitriles. J Org Chem 2024; 89:2748-2758. [PMID: 38277233 DOI: 10.1021/acs.joc.3c02869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2024]
Abstract
A practical and efficient protocol for synthesis of >99% diastereopure Z- and E-alkenyl nitriles is developed, through tetramethylthiourea-mediated stereospecific deoxygenation of respective cis- and trans-cyanoepoxides in ethanol. The desired products are obtained in excellent yields.
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Affiliation(s)
- Yujie Zhang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Shukui Shi
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
- College of Chemistry and Pharmacy Engineering, Nanyang Normal University, Nanyang 473061, P.R. China
| | - Zhanhui Yang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
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Li L, Hu J, Fu Y, Shi X, Du H, Xu J, Chen N. Direct Regioselective C-H Cyanation of Purines. Molecules 2023; 28:molecules28030914. [PMID: 36770582 PMCID: PMC9920237 DOI: 10.3390/molecules28030914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 01/13/2023] [Accepted: 01/13/2023] [Indexed: 01/18/2023] Open
Abstract
A direct regioselective C-H cyanation of purines was developed through a sequential triflic anhydride activation, nucleophilic cyanation with TMSCN, followed by a process of base-mediated elimination of triflous acid (CF3SO2H). In most cases, the direct C-H cyanation occurred on the electron-rich imidazole motif of purines, affording 8-cyanated purine derivatives in moderate to excellent yields. Various functional groups, including allyl, alkynyl, ketone, ester, nitro et al. were tolerated and acted as a C8 directing group. The electron-donating 6-diethylamino, as C2-directing group substituent, can switch the regioselectivity of purine from 8- to 2-position, enabling the synthesis of 8- and 2-cyano 6-dialkylaminopurines from corresponding 6-chloropurine in different reaction order. Further functional manipulations of the cyano group allow the conversions of 8-cyanopurines to corresponding purine amides, imidates, imidothioates, imidamides, oxazolines, and isothiazoles.
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Lotsman KA, Rodygin KS, Skvortsova I, Kutskaya AM, Minyaev ME, Ananikov VP. Atom-economical synthesis of 1,2-bis(phosphine oxide)ethanes from calcium carbide with straightforward access to deuterium- and 13C-labeled bidentate phosphorus ligands and metal complexes. Org Chem Front 2023. [DOI: 10.1039/d2qo01652d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Straightforward access to bidentate phosphorus ligands and bis(phosphineoxide)ethanes is described based on atom-economic addition reaction. A practical approach was developed to incorporate 2H and 13C labels using easily available reagents.
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Affiliation(s)
- Kristina A. Lotsman
- Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, Stary Petergof 198504, Russia
| | - Konstantin S. Rodygin
- Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, Stary Petergof 198504, Russia
| | - Irina Skvortsova
- Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, Stary Petergof 198504, Russia
| | - Anastasia M. Kutskaya
- Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, Stary Petergof 198504, Russia
| | - Mikhail E. Minyaev
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky pr. 47, Moscow 119991, Russia
| | - Valentine P. Ananikov
- Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, Stary Petergof 198504, Russia
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky pr. 47, Moscow 119991, Russia
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The design and Synthesis of 5-(morpholin-4-yl)-N'-sulfonyl-1,2,3-thiadiazole-4-amidines. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03124-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Tokareva MA, Pernik I, Lewis W, Messerle BA, Glukhareva TV, Keaveney ST. Rh(I)-Catalyzed Denitrogenative Transformations of 1,2,3-Thiadiazoles: Ligand-Controlled Product Selectivity and the Structure of the Key Organorhodium Intermediate Revealed. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01175] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Marina A. Tokareva
- Institute of Chemical Technology, Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russian Federation
- School of Natural Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Indrek Pernik
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - William Lewis
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
- Sydney Analytical, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Barbara A. Messerle
- School of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Tatiana V. Glukhareva
- Institute of Chemical Technology, Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russian Federation
- Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences (UB RAS), 22 Sofia Kovalevskaya Street, Yekaterinburg, 620990, Russian Federation
| | - Sinead T. Keaveney
- School of Natural Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales 2522, Australia
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Chen C, Fang S, Dong Z, Xu J, Yang Z. Catalytic Diastereospecific and Enantioselective (3 + 2) Transannulations of 1,2,3-Thiadiazoles with Strained Norbornene Derivatives. Org Lett 2022; 24:2110-2114. [PMID: 35274965 DOI: 10.1021/acs.orglett.2c00330] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
With the adoption of a ring-strain-release strategy, iridium-catalyzed transannulations with norbornene derivatives are achieved in a diastereospecific and enantioselective manner. The first asymmetric transannulations of 1,2,3-thiadiazoles are reported.
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Affiliation(s)
- Cunzhi Chen
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Shuyan Fang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Ziyang Dong
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Jiaxi Xu
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Zhanhui Yang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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Wu Q, Chen N, Xu J. Chemoselectivity in the Transannulaction of 1,2,3‐Thiadiazoles and Alk‐2‐enenitriles: Specific Synthesis of 3‐(Alk‐1‐enyl)isothiazoles. ChemistrySelect 2022. [DOI: 10.1002/slct.202103943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qiuyue Wu
- State Key Laboratory of Chemical Resource Engineering Department of Organic Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 People's Republic of China
| | - Ning Chen
- State Key Laboratory of Chemical Resource Engineering Department of Organic Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 People's Republic of China
| | - Jiaxi Xu
- State Key Laboratory of Chemical Resource Engineering Department of Organic Chemistry College of Chemistry Beijing University of Chemical Technology Beijing 100029 People's Republic of China
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Dong Z, Ma MY, Xu J, Yang Z. Catalytic (3 + 2) umpolung annulations of α-thioacyl carbenes with aryl isothiocyanates. Chem Commun (Camb) 2022; 58:7980-7983. [DOI: 10.1039/d2cc02882d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
As masked S-electrophilic thia-1,3-dipoles, 1,2,3-thiadiazoles undergo denitrogenative (3 + 2) umpolung transannulations with aryl isothiocyanates, regio- and stereoselectively.
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Affiliation(s)
- Ziyang Dong
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Meng-Yao Ma
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Jiaxi Xu
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Zhanhui Yang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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