Compositions and methods for dehydration and cyclization of peptides, synthetic compounds, and lantibiotics
申请人:van der Donk A. Willem
公开号:US20050164339A1
公开(公告)日:2005-07-28
Lantibiotics are synthesized on ribosomes as prepeptides and post-translationally modified to a mature form. These modifications include dehydrations and cyclizations. Compounds and related methods of generating compounds, modified by dehydration, cyclization, or dehydration and cyclization, are disclosed. The disclosure includes in vitro approaches to effecting dehydration and cyclization leading to production of biologically active compounds such as lantibiotics and variants thereof. Synthetic variants and methods including combinatorial approaches for generating diverse lantibiotics and other compounds are disclosed. The invention has broad potential for applications including food, agricultural, and medical industries.
Reaction of Allyl Diphenyl Phosphates with Soft Bases
作者:Shuki Araki、Kazuhiro Minami、Yasuo Butsugan
DOI:10.1246/bcsj.54.629
日期:1981.2
The title phosphates were found to react with a variety of soft bases to give nucleophilic substitution products in high yields. The reaction proceeded regiospecifically under mild reaction conditions with preservation of the double bond geometry.
Chemoselective sulfur oxidation of allylic sulfides containing double bonds of high electron density due to multiple alkyl substituents or extended conjugation was developed using the composite metal oxidecatalyst, LiNbMoO(6), without any epoxidation of the electron-rich double bond(s). Selectiveoxidation to either the corresponding sulfoxides or the sulfones was realized by controlling the stoichiometry