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.
An Improved Procedure for the Synthesis of 1,5-Benzothiazepines Using Ceric Ammonium Nitrate (CAN)
作者:Asha V. Chate、Ratnadeep S. Joshi、Priyanka G. Mandhane、Charansingh H. Gill
DOI:10.5012/jkcs.2011.55.5.776
日期:2011.10.20
A mild and efficient procedure for the synthesis of various 1,5-benzothiazepines were developed. This method provides an easy access for preparation of 1,5-benzothiazepine derivatives in the presence of 10 mol% catalyst of CAN under ultrasonic irradiation. This method provided clean conversion, mild reaction condition, no use of toxic solvent and shorter reaction time compared to other reported method.
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.
Crystal structures of a new thiazepine and diazepine (seven‐membered rings) have also been determined and compared with thiazine (six‐membered ring). In this method, N‐methylimidazolium nitrate [Hmim][NO3] has been used as a catalyst that acts as an environmental friendly system.