Efficient synthesis of substituted 1-dimethylamino or 1-methylthio but-3-enylidene-bis-phosphonates, via the [2,3]-sigmatropic rearrangement of related transient ammonium or sulfonium ylides
L. Lemee et al., Efficient synthesis of substituted 1-dimethylamino or 1-methylthio but-3-enylidene-bis-phosphonates, via the [2,3]-sigmatropic rearrangement of related transient ammonium or sulfonium ylides, HETEROAT CH, 10(4), 1999, pp. 281-289
New variously substituted 1-dimethyamino or 1-methylthio but-3-enylidene-bi
s-phosphonates have been prepared fi om readily available alpha-dimethylami
no or alpha-methylthio methylene-bis-phosphonates by postulated [2,3]-Witti
g rearrangements of the corresponding N- or S-allylic intermediate ylides.
(C) 1999 John Wiley & Sons, Inc.