Use of (Z)-β-(2-Fluorobenzenesulfonyl)vinylamines as Novel Synthons in the Synthesis of 1,4-Benzothiazine Derivatives
摘要:
A novel synthetic route for arylated 1,4-benzothiazine derivatives has been developed. This method utilizes a key intramolecular nucleophilic aromatic substitution step of the corresponding (Z)-beta-(2-fluorobenzenesulfonyl) vinylamine intermediate to construct the benzothiazine ring. A wide range of aryl and heteroaryl substituent groups can be installed from commercial boronic acids. Both mono-and diarylated products have been synthesized in good yields and with good functional group tolerance.
High yield synthesis of 4<i>H</i>-1,4-benzothiazine-1,1-dioxide derivatives
作者:Stefania De Montis、Claudia Fattuoni、Enzo Cadoni、Maria G. Cabiddu、Michele Usai、Salvatore Cabiddu
DOI:10.1002/jhet.5570450530
日期:2008.9
4H-1,4-Benzothiazine-1,1-dioxidederivatives were synthesized through a sequence of almost quantitative reactions. The commercial starting material 2-(methylsulfanyl)aniline was Boc-protected, N-acylated and oxidized at the sulfur atom to obtain a sulfonyl derivative. An anionic transposition of the acyl group followed by asimultaneous deprotection-cyclization gave the title products in excellent yields
通过一系列几乎定量的反应合成了4 H -1,4-苯并噻嗪-1,1-二氧化物衍生物。将商品原料2-(甲基硫烷基)苯胺进行Boc保护,N-酰化并在硫原子上氧化以获得磺酰基衍生物。酰基的阴离子转座,然后同时进行脱保护-环化,可以以优异的收率得到标题产物。所有产品和中间体均经过充分表征。
MacKenzie, Neil E.; Thomson, Ronald H.; Greenhalgh, Colin W., Journal of the Chemical Society. Perkin transactions I, 1980, p. 2923 - 2932
作者:MacKenzie, Neil E.、Thomson, Ronald H.、Greenhalgh, Colin W.
DOI:——
日期:——
MACKENZIE N. E.; THOMSON R. H.; GREENHAIGH C. W., J. CHEM. SOC. PERKIN TRANS., PART 1, 1980, NO 12, 2923-2932
作者:MACKENZIE N. E.、 THOMSON R. H.、 GREENHAIGH C. W.