Sulfinyl-Mediated Stereoselective Overman Rearrangements and Diels–Alder Cycloadditions
摘要:
The Overman rearrangement of allylic sulfinyl trichloroacetimidates affords sulfinyl trichloroacetamides with high stereoselectivity and excellent yields. Bis-allylic substrates lead to amido 2-sulfinyl butadiene derivatives in excellent yields, with total chemo- and diastereoselectivity. The Diels-Alder cycloaddition of related dienes is controlled by the sulfoxide moiety.
Sulfinyl-Mediated Chirality Transfer in Diastereoselective Claisen Rearrangements
作者:Roberto Fernández de la Pradilla、Carlos Montero、Mariola Tortosa
DOI:10.1021/ol0261130
日期:2002.7.1
[reaction: see text] The highly selective Claisenrearrangements of substrates bearing a sulfinyl moiety at C-5 allow for creation of up to two asymmetric centers and preserve a useful vinyl sulfoxide.