Magnesium perchlorate as a new and highly efficient catalyst for the synthesis of 2, 3-dihydro-1, 5-benzothiazepines

GL Khatik, R Kumar, AK Chakraborti

文献索引：Khatik, Gopal L.; Kumar, Raj; Chakraborti, Asit K. Synthesis, 2007 , # 4 p. 541 - 546

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被引用次数: 29

摘要

We thought that the construction of the 1,5-benzothiazepine moiety from 1 and 2 may involve two pathways: (i) conjugate addition of the sulfhydryl group of 2 to the α,β-unsaturated carbonyl group of 1 leading to the intermediate formation of the thia-Michael adduct I which, on subsequent intramolecular nucleophilic attack by the NH 2 group on the carbonyl carbon followed by dehydration, forms the 2,3-dihydro-1,5-benzothiazepine 3 (Path a), [16] or (ii) ...