Studies on sulfoxide rearrangements: regioselective synthesis of 3-(aryloxyacetyl)-2,3-dihydrothieno[3,2-c][1]benzopyran-4-ones
作者:K.C Majumdar、S.K Ghosh
DOI:10.1016/s0040-4039(02)00200-9
日期:2002.3
Hitherto unreported 3-(aryloxyacetyl)-2,3-dihydrothieno[3,2-c][1] benzopyran-4-ones 5a–f were synthesised in 70–75% yields by the application of the sulfoxide rearrangement of 4-(4-aryloxybut-2-ynylthio)[1]benzopyran-2-ones 4a–f. The substrates 4a–f were synthesised by phase-transfer-catalysed alkylation of previously unreported 4-mercaptocoumarin.
迄今为止,未反应的3-(芳氧基乙酰基)-2,3-二氢噻吩并[3,2- c ] [1]苯并吡喃-4-酮5a - f通过4-(-)亚砜重排合成以70-75%的产率合成。 4-芳氧基丁-2-炔硫基] [1]苯并吡喃-2-酮4a – f。底物4a – f是通过相转移催化的以前未报道的4-巯基香豆素的烷基化反应合成的。