Synthesis and Application of 1,2-Aminoalcohols with Neoisopulegol-Based Octahydrobenzofuran Core
作者:Fatima Zahra Bamou、Tam Minh Le、Bettina Volford、András Szekeres、Zsolt Szakonyi
DOI:10.3390/molecules25010021
日期:——
(+)-neoisopulegol, derived from natural (–)-isopulegol followed by cyclization, gave the key methyleneoctahydrobenzofuran intermediate. The stereoselective epoxidation of the key intermediate and subsequent oxirane ring opening with primary amines afforded the required 1,2-aminoalcohols. The ring closure of the secondary amine analogues with formaldehyde provided spiro-oxazolidine ring systems. The dihydroxylation
开发了具有基于新异胡薄荷醇的八氢苯并呋喃核的 1,2-氨基醇衍生物库,并将其用作手性催化剂,将二乙基锌添加到苯甲醛中。(+)-新异胡薄荷醇的烯丙基氯化衍生自天然 (-)-异胡薄荷醇,然后环化,得到关键的亚甲基八氢苯并呋喃中间体。关键中间体的立体选择性环氧化和随后的环氧乙烷开环与伯胺提供所需的 1,2-氨基醇。仲胺类似物与甲醛的闭环提供了螺-恶唑烷环系统。亚甲基四氢呋喃部分与 OsO4/NMO(4-甲基吗啉 N-氧化物)的二羟基化导致在高度立体选择性反应中形成基于新异胡薄荷醇的二醇。