1
|
Shao R, Zhao H, Ding S, Li L, Chen C, Wang J, Shang Y. Silver-promoted dearomative [3+4] cycloaddition of anthranils with α-isocyanoacetates: access to benzodiazepines. Chem Commun (Camb) 2022; 58:4771-4774. [PMID: 35343523 DOI: 10.1039/d2cc00807f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of silver-promoted [3+4] cycloaddition of α-isocyanoacetates with anthranils as aromatic Michael accepters, offering access to benzo[d][1,3]diazepinones, has been developed. Mechanistic studies revealed that an "oxygen migration" rearrangement process was involved in this dearomative cycloaddition reaction. Additionally, benzo[d][1,3]diazepinones were obtained efficiently as well under catalytic conditions. Broad functional groups were well tolerated under mild reaction conditions.
Collapse
Affiliation(s)
- Rui Shao
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China.
| | - Haixia Zhao
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China.
| | - Shumin Ding
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China.
| | - Lianjie Li
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China.
| | - Chen Chen
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China.
| | - Jian Wang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China.
| | - Yongjia Shang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P. R. China.
| |
Collapse
|
2
|
Shen J, Li S, Yao Z, Lin S, Cui X. Base-promoted Cyclization Reaction of o-Isothiocyanato Arylacetylenes and Aroylacetonitriles: Easy Access to Benzo[d][1,3]thiazines. Org Biomol Chem 2022; 20:7236-7240. [DOI: 10.1039/d2ob01424f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A green and efficient synthesis of benzo[d][1,3]thiazines through base-promoted cyclization reaction of o-isothiocyanato arylacetylenes with aroylacetonitriles has been developed. This protocol displays high step economy and efficiency, and tolerates various...
Collapse
|
3
|
Huang J, Li X, Wen H, Ouyang L, Luo N, Liao J, Luo R. Substrate-Controlled Cu(OAc) 2-Catalyzed Stereoselective Semi-Reduction of Alkynes with MeOH as the Hydrogen Source. ACS OMEGA 2021; 6:11740-11749. [PMID: 34056327 PMCID: PMC8154033 DOI: 10.1021/acsomega.1c01083] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Accepted: 04/09/2021] [Indexed: 06/12/2023]
Abstract
A substrate-controlled stereoselective semi-reduction of alkynes with MeOH as the hydrogen source has been developed, and readily available Cu(OAc)2 (copper acetate) is utilized as an optimal catalyst. The detailed investigation of the mechanism revealed distinct catalytic processes for the (Z)- and (E)-alkenes, respectively. As a result, a diversity of alkynes (including terminal, internal alkynes etc.) were compatible under the mild reaction conditions. Furthermore, the high proportion of deuterium in Z-alkenes (up to 96%) was obtained using d 4-methanol as a solvent.
Collapse
Affiliation(s)
- Jiuzhong Huang
- School
of Pharmacy, Gannan Medical University, Ganzhou 341000, P. R. China
| | - Xiaoning Li
- Key
Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular
Diseases of Ministry of Education, Gannan
Medical University, Ganzhou 341000, P. R. China
| | - Huiling Wen
- School
of Pharmacy, Gannan Medical University, Ganzhou 341000, P. R. China
| | - Lu Ouyang
- School
of Pharmacy, Gannan Medical University, Ganzhou 341000, P. R. China
| | - Nianhua Luo
- School
of Pharmacy, Gannan Medical University, Ganzhou 341000, P. R. China
| | - Jianhua Liao
- School
of Pharmacy, Gannan Medical University, Ganzhou 341000, P. R. China
| | - Renshi Luo
- School
of Pharmacy, Gannan Medical University, Ganzhou 341000, P. R. China
| |
Collapse
|
4
|
Wang H, Wu X, Wang L, Li E, Li X, Tong T, Kang H, Xie J, Shen G, Lv X. One-Pot Synthesis of Benzimidazo[2,1- b]thiazoline Derivatives through an Addition/Cyclization/Oxidative Coupling Reaction. J Org Chem 2020; 85:11934-11941. [PMID: 32815368 DOI: 10.1021/acs.joc.0c01137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel and efficient approach to the synthesis of benzimidazo[2,1-b]thiazoline derivatives has been developed through an addition/cyclization/intramolecular oxidative C-H functionalization process. A variety of alkylene benzimidazo[2,1-b] thiazolines were conveniently assembled from the reaction of aryl isothiocyanate and propargylic amine in the presence of Cu(OAc)2 and PIFA at room temperature. The product could be further converted to substituted benzimidazo[2,1-b]thiazole derivatives.
Collapse
Affiliation(s)
- Haofeng Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Xin Wu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Luyu Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Erfei Li
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Xiaoyu Li
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Tao Tong
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Honglan Kang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Jianwu Xie
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| | - Guodong Shen
- School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252059, Shandong, People's Republic of China
| | - Xin Lv
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, People's Republic of China
| |
Collapse
|
5
|
Liu Y, Yao S, Wang C, Zhang Y, Hao W. Copper(ii)-catalyzed tandem cyclization for the synthesis of benzo[ d][1,3]thiazin-2-yl phosphonates involving C-P and C-S bond formation. RSC Adv 2020; 10:32211-32215. [PMID: 35518184 PMCID: PMC9056576 DOI: 10.1039/d0ra06671k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 08/13/2020] [Indexed: 02/04/2023] Open
Abstract
A copper(ii)-catalyzed, high-efficiency and atom-economical synthesis of valuable organophosphorus compounds via tandem cyclization of o-alkynylphenyl isothiocyanates with phosphites is described. This protocol, having a good functional-group compatibility, provides a simple and direct pathway to organophosphorus heterocycles in good yields under mild conditions. The method could be efficiently scaled up to gram scale, thus providing a potential application of this cascade cyclization strategy in synthesis. A simple and highly efficient cascade cyclization of o-alkynylphenyl isothiocyanates with phosphites has been developed, affording a series of 4H-benzo[d][1,3]thiazin-2-yl phosphonates in moderate to good yields.![]()
Collapse
Affiliation(s)
- Yang Liu
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, College of Chemistry & Chemical Engineering, Jiangxi Normal University 99 Ziyang Road Nanchang Jiangxi 330022 P. R. China
| | - Shijie Yao
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, College of Chemistry & Chemical Engineering, Jiangxi Normal University 99 Ziyang Road Nanchang Jiangxi 330022 P. R. China
| | - Chaoli Wang
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, College of Chemistry & Chemical Engineering, Jiangxi Normal University 99 Ziyang Road Nanchang Jiangxi 330022 P. R. China
| | - Yahui Zhang
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, College of Chemistry & Chemical Engineering, Jiangxi Normal University 99 Ziyang Road Nanchang Jiangxi 330022 P. R. China
| | - Wenyan Hao
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, College of Chemistry & Chemical Engineering, Jiangxi Normal University 99 Ziyang Road Nanchang Jiangxi 330022 P. R. China
| |
Collapse
|
6
|
Development of a Telescoped Flow Process for the Safe and Effective Generation of Propargylic Amines. MOLECULES (BASEL, SWITZERLAND) 2019; 24:molecules24203658. [PMID: 31658759 PMCID: PMC6833020 DOI: 10.3390/molecules24203658] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 10/07/2019] [Accepted: 10/08/2019] [Indexed: 12/28/2022]
Abstract
Propargylic amines are important multifunctional building blocks that are frequently exploited in the synthesis of privileged heterocyclic entities. Herein we report on a novel flow process that achieves the safe and effective on-demand synthesis of propargylic amines in a telescoped manner. This process minimizes exposure to hazardous azide intermediates and renders a streamlined route into these building blocks. The value of this approach is demonstrated by the rapid generation of a small selection of drug-like thiazolines that result from a high-yielding reaction cascade between propargylic amines with different aryl isothiocyanates.
Collapse
|
7
|
Yang R, Deng S, Dong XY, Song X, Cai H, Bai J, Xiao Q. Metal-free synthesis of 1, N6-ethenoadenines from N6-propargyl-adenines via NIS mediated radical cascade reaction. RSC Adv 2019; 9:38897-38901. [PMID: 35540232 PMCID: PMC9075968 DOI: 10.1039/c9ra09198j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 11/18/2019] [Indexed: 11/21/2022] Open
Abstract
In the present paper, an efficient approach for the construction of 1,N6-ethenoadenines from conveniently prepared N6-propargyl-adenines is developed. This reaction merges N-iodosuccinimide radical initiation and aerobic aminooxygenation in dioxane. This mild, 5-exo-dig, and metal-free cascade reaction could be applied to a wide substrate scope to provide 1,N6-ethenoadenines in moderate to good yields. The reaction mechanism was proposed and tested using radical inhibitor (butylated hydroxytoluene) and isotopic labelling (18O2) experiments. An efficient approach for the construction of 1,N6-ethenoadenines is developed through the metal-free mediated radical cascade cyclization of conveniently prepared N6-propargyl-adenines.![]()
Collapse
Affiliation(s)
- Ruchun Yang
- Institute of Chemistry
- Nanchang University
- Nanchang 330031
- China
- Institute of Organic Chemistry
| | - Si Deng
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Xiang-you Dong
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Xianrong Song
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Hu Cai
- Institute of Chemistry
- Nanchang University
- Nanchang 330031
- China
| | - Jiang Bai
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| | - Qiang Xiao
- Institute of Organic Chemistry
- Jiangxi Science & Technology Normal University
- Key Laboratory of Organic Chemistry
- Nanchang 330013
- China
| |
Collapse
|