The preparation of 3-substituted 1,2-benzisothiazole 1,1-dioxides from lithiated intermediates or grignard reagents and methyl 2-(aminosulfonyl)benzoate
作者:S. Patrick Dunn、Laela M. Hajiaghamohseni、Sara B. Lioi、Michelle A. Meierhoefer、Matthew J. Walters、Charles F. Beam
DOI:10.1002/jhet.5570410225
日期:2004.3
A polylithiated β-ketoester, β-diketone, or β-ketoamide was condensed-cyclized with lithiated methyl 2-(aminosulfonyl)benzoate, to afford new 3-substituted 1,2-benzisothiazole 1,1-dioxides. Some Grignard or organolithium reagents were also condensed-cyclized with methyl 2-(aminosulfonyl)benzoate to give 3-substituted 1,2-benzisothiazole 1,1-dioxides.
用锂化的2-(氨基磺酰基)苯甲酸甲酯将多片化的β-酮酯,β-二酮或β-酮酰胺缩合环化,得到新的3-取代的1,2-苯并噻唑1,1-二氧化物。一些格氏试剂或有机锂试剂也与2-(氨基磺酰基)苯甲酸甲酯缩合环化,得到3-取代的1,2-苯并噻唑1,1-二氧化物。