Abstract A facile method for the synthesis of a series of novel β-acylamino furans stating from renewable monosaccharide was achieved. Glucosamine hydrochloride was selectively N-acylated with acyl chlorides in methanol/triethylamine to yield N-acyl-d-glucosamines, which were subsequently converted into β-acylamino furans through dehydration and cyclization under microwave irradiation.
摘要 实现了一种由可再生单糖合成一系列新型β-酰基氨基呋喃的简便方法。葡糖胺盐酸盐是选择性Ñ -acylated与酰氯在甲醇/三乙胺,得到Ñ -acyl- d -葡糖胺,随后被转化成β微波辐射下通过脱水和环化-酰基呋喃。
Diphenyl (2,3-Dihydro-2-thioxo-3-benzoxazolyl)phosphonate: A New, Reactive Condensing Agent for the Synthesis of Amides, Esters, Peptides, and β-Lactams via Condensation
作者:Mitsuru Ueda、Hideharu Mori
DOI:10.1246/bcsj.65.1636
日期:1992.6
Diphenyl (2,3-dihydro-2-thioxo-3-benzoxazolyl)phosphonate (1) prepared from 2-benzoxazolethiol and diphenyl phosphorochloridate was proved to be a very useful condensing agent. A variety of amides, esters, and dipeptides were obtained in excellent yields. Furthermore, this reagent was successfully applied to the synthesis of β-lactams from β-amino acids.