The synthesis of a key intermediate en route to gelsemine: a program based on intramolecular displacement of the carbonoxygen bond of a strategic oxetane
作者:Fay W Ng、Hong Lin、Qiang Tan、Samuel J Danishefsky
DOI:10.1016/s0040-4039(01)02212-2
日期:2002.1
The synthesis of keyintermediate 30 enroute to gelsemine has been accomplished from known aldehyde 10 via oxetane 19 featuring stereospecific Claisen rearrangement and Lewis acid-catalyzed oxetane ring opening.
Klumpp,G.W. et al., Recueil des Travaux Chimiques des Pays-Bas, <hi>1969</hi>, vol. 88, p. 766 - 778
作者:Klumpp,G.W. et al.
DOI:——
日期:——
Explorations in Organic Chemistry Leading to the Total Synthesis of (±)-Gelsemine
作者:Fay W. Ng、Hong Lin、Samuel J. Danishefsky
DOI:10.1021/ja0204675
日期:2002.8.1
The totalsynthesis of (+/-)-gelsemine (1) is described. A defining phase of the effort involved recourse to a strategic oxetane ring (see compound 25). It was constructed anticipating an intramolecular displacement of the carbon (C17)-oxygen (O4) bond (see product 48). A key intermediate in the stereospecific elaboration of the oxetane linkage was enone 22, which was susceptible to two beta-face attacks