Total synthesis of dehaloperophoramidine using a highly diastereoselective Hosomi–Sakurai reaction
作者:Ross. P. Wilkie、Andrew R. Neal、Craig A. Johnston、Nicholas Voute、Christopher S. Lancefield、Matthew D. Stell、Federico Medda、Edward F. Makiyi、Emma M. Turner、O. Stephen Ojo、Alexandra M. Z. Slawin、Tomas Lebl、Peter Mullen、David J. Harrison、Chris M. Ireland、Nicholas J. Westwood
DOI:10.1039/c6cc05747k
日期:——
The synthesis of dehaloperophoramidine, a non-halogenated derivative of the marine natural product perophoramidine, is reported. The key steps included a [3,3]-Claisen rearrangement and an epoxide opening/allylsilylation (modified Hosomi-Sakurai) reaction to...
Studies on the Claisen rearrangements in the indolo[2,3-b]quinoline system
作者:Nicholas Voûte、Douglas Philp、Alexandra M. Z. Slawin、Nicholas J. Westwood
DOI:10.1039/b915677a
日期:——
A study of the effect of substrate structure on a Claisen-aza-Cope reaction is presented including a rationalisation of the reaction outcome using DFT calculations. An asymmetric version of the reaction is also described that is of relevance to a proposed approach to the communesin family of natural products.
From one to two quaternary centers: Ester or nitrile α-alkylation applied to bioactive alkaloids
作者:Nicholas Voute、Andrew R. Neal、Federico Medda、Craig A. Johnston、Alexandra M.Z. Slawin、Nicholas J. Westwood
DOI:10.1016/j.tet.2018.10.077
日期:2018.12
The synthesis of all-carbonquaternarycenters remains a challenge. Here we describe studies on the formation of two adjacent all-carbonquaternarycenters in the context of the planned synthesis of the bioactive natural products perophoramidine and the communesins. In one approach the key step involves ester-alkylation using either allyl bromide or formaldehyde as the electrophile. An unexpected rapid