Facile transformation of 2-azetidinones to unsaturated ketones: application to the formal synthesis of sphingosine and phytosphingosine
作者:Hyeon Kyu Lee、Eun-Kyung Kim、Chwang Siek Pak
DOI:10.1016/s0040-4039(02)02444-9
日期:2002.12
2-Azetidinones were smoothly transformed to unsaturated ketones through the ring opening of activated 2-azetidinone by phosphonate stabilized carbanion and subsequent Horner–Wadsworth–Emmons olefination of the resulting β-ketophosphonates with aldehydes. A formalsynthesis of l-erythro-sphingosine and d-lyxo-phytosphingosine from readily available 2-azetidinone was established utilizing this methodology