Baker's yeast catalyzed synthesis of 1,4-benzothiazines, performed under ultrasonication
作者:Umesh R. Pratap、Dhanaji V. Jawale、Balaji S. Londhe、Ramrao A. Mane
DOI:10.1016/j.molcatb.2010.09.018
日期:2011.1
An efficient and simple one pot method has been developed for the synthesis of 1,4-benzothiazines by allowing the condensation of 2-aminobenzenethiols and 1,3-dicarbonyls using cheaper biocatalyst, baker'syeast. The role of ultrasonication in the rate expediting of the condensation has been discussed.
Novel synthesis of 1,4-benzothiazines in water accelerated by β-cyclodextrin
作者:Balaji S. Londhe、Sudhakar L. Padwal、Manisha R. Bhosale、Ramrao A. Mane
DOI:10.1007/s13738-015-0752-3
日期:2016.3
Novel one-pot synthetic protocol has been developed for obtaining 2, 3-disubstituted 1,4-benzothiazines with excellent yields, carrying cyclocondensation of 1,3-dicarbonyl compounds with substituted 2-(2-(2-aminophenyl)disulfanyl)benzenamines, under supramolecular catalysis of β-Cyclodextrin (β-CD) in water at neutral pH. The role of β-CD in accelerating the cyclocondensation has been demonstrated. This biomimic catalyzed route is simple, economic, relatively rapid and environmentally benign.
A simple and efficient method has been developed for the rapid synthesis of substituted 4H-1, 4-benzothiazines (3) from 2-aminobenzenethiols (1) and β-ketoester/β-diketones (2) in dry media undermicrowaveirradiation using basic alumina as solidsupport.
Dandia, Anshu; Sarawgi, Pritima; Hursthouse, Michael B., Journal of Chemical Research, 2006, # 7, p. 445 - 448
作者:Dandia, Anshu、Sarawgi, Pritima、Hursthouse, Michael B.、Bingham, Ann L.、Light, Mark E.、Drake, John E.、Ratnani, Raju
DOI:——
日期:——
A Facile and Green Synthesis of 5-(3-methyl-7-substituted-4H-1, 4-benzothiazin-2-yl)-4-aryl-4H-1, 2, 4-triazole-3-thiols under Ultrasound Irradiation
作者:BHIKAN J. KHAIRNAR、PRAVIN S. GIRASE、B.R. CHAUDHARI