The absolute configurations of angelols A-H (1-8) isolated from Angelica pubescens MAXIM. (Umbelliferae) were determined to be as shown in Chart 1 by means of chemical, spectral and X-ray analysis. Furthermore, the stereostructure of angelol B (2) was determined to be as shown in Fig. 1 on the basis of X-ray analysis.
Synthese und Hydrolyse von 6-<i>exo</i>-substituierten 2-Methyl-2-<i>exo</i>-norbornyl und 2-Methyl-2-<i>endo</i>-norbornyl-(2,4-dinitrophenyl)äthern Norbornane. 16. Mitteilung
作者:Cyril A. Grob、Georg Von Sprecher、Adrian Waldner
DOI:10.1002/hlca.19830660834
日期:1983.12.14
The Synthesis and Hydrolysis of 6-exo-Substituted 2-Methyl-2-exo-norbornyl and 2-Methyl-2-endo-norbornyl 2,4-Dinitrophenyl Ethers
6-外取代的2-甲基-2-外-降冰片基和2-甲基-2-内-降冰片基2,4-二硝基苯基醚的合成与水解
Asymmetric synthesis of α,α-disubstituted α-amino acid derivatives using MABR promoted rearrangement
作者:Masayuki Matsushita、Hana Maeda、Mitsuaki Kodama
DOI:10.1016/s0040-4039(98)00576-0
日期:1998.5
An efficient route for the asymmetric synthesis of α,α-disubstituted α-amino acidsderivatives (1, 2, and 3) starting from readily available epoxy silyl ethers (6) has been developed. High enantiomeric purity can be realized by the present method using a combination of MABR rearrangement of a chiral epoxide and Curtius rearrangement.