Oxazepines and Thiazepines XXXVII [1]. A Simple and Convenient Procedure for the Preparation of 3-Acyl-2,3-dihydrobenzothiazoles by Ring Contraction of 2,4-Diaryl-2,3-dihydro-1,5-benzothiazepines under Acylating Conditions
摘要:
3-Acyl-2,3-dihydrobenzothiazoles 13-30 were prepared by ring contraction of 2,4-diaryl-2,3-dihydro-1,5-benzothiazepines 1-12 under acylating conditions. This procedure provides a general and efficient access to these benzothiazole derivatives.
A practical synthesis of 2,3-dihydro-1,5-benzothiazepines
作者:Domenico C. M. Albanese、Nicoletta Gaggero、Meng Fei
DOI:10.1039/c7gc02097j
日期:——
2,3-Dihydro-1,5-benzothiazepines have been obtained through a domino process involving a Michael addition of 2-aminothiophenols to chalcones, followed by in situ cyclization. Up to 98% chemical yields have been obtained at room temperature under essentially neutral conditions by using hexafluoro-2-propanol as an efficient medium.
Magnesium Perchlorate as a New and Highly Efficient Catalyst for the Synthesis of 2,3-Dihydro-1,5-benzothiazepines
作者:Asit Chakraborti、Gopal Khatik、Raj Kumar
DOI:10.1055/s-2007-965892
日期:2007.2
Commercially available magnesium perchlorate has been found to be a highly efficient catalyst for the reaction of 1,3-diarylprop-2-enones with 2-aminothiophenol leading to the synthesis of 2,3-dihydro-1,5-benzothiazepines in high yields and in short times.
Catalyst-free synthesis of 2,3-dihydro-1,5-benzothiazepines in a renewable and biodegradable reaction medium
作者:Neetu Yadav、Vijay B. Yadav、Mohd Danish Ansari、Hozeyfa Sagir、Ankit Verma、I. R. Siddiqui
DOI:10.1039/c8nj05611k
日期:——
A clean and efficient strategy for the synthesis of benzothiazepines from chalcone and ortho-aminothiophenol has been reported.
一种从查尔酮和邻氨基硫酚合成苯噻吩的清洁高效策略已被报道。
Synthesis and Study of Catalytic Perspectives of DABCO Based Ionic Liquid for the Synthesis of 2,3-Dihydro-1,5-Benzothiazepines and 2-Phenylbenzothiazoles
作者:Priyanka Pinate、Sangita Makone
DOI:10.1007/s10562-022-04033-z
日期:2023.4
DABCO based ionicliquids through the comparison of [H2-DABCO][HSO4]2, [H2-DABCO][H2PO4]2, [H2-DABCO][ClO4]2, and [C4H10-DABCO][HSO4]2. The proposed method displayed several advantages over prior methods, including use of non-metal and inexpensive catalyst, shorter reaction times, green solvent media, moderate to excellent product yields, easy work-up, and recyclability of the ionicliquid for subsequent
‘On water’ synthesis of 2,4-diaryl-2,3-dihydro-1,5-benzothiazepines catalysed by sodium dodecyl sulfate (SDS)
作者:Gaurav Sharma、Raj Kumar、Asit K. Chakraborti
DOI:10.1016/j.tetlet.2008.04.146
日期:2008.6
An efficient synthesis of 1,3-diaryl-2,3-dihydro-1,5-benzothiazepines has been developed by the reaction of various 1,3-diaryl-2-propenones with 2-aminothiophenol in water under neutral conditions catalysed by SDS. Excellent chemoselectivity was observed for substrates possessing halogen atoms or nitro/alkoxy/thioalkyl groups which did not undergo competitive aromatic nucleophilic substitution of the halogen atoms or the nitro group, reduction of the nitro or the a,p-unsaturated carbonyl group, or dealkylation of the alkoxy/thioalkoxy groups. (C) 2008 Elsevier Ltd. All rights reserved.