Synthesis of γ-oxo α-amino acids from L-aspartic acid
作者:Alexander S. Golubev、Norbert Sewald、Klaus Burger
DOI:10.1016/0040-4020(96)00942-8
日期:1996.11
of different γ-oxo α-amino acids from hexafluoroacetone protected L-aspartic acid chloride 1 via Stille cross coupling reaction is described. Stille reaction of 1 with vinyltributyltin followed by Lewis acid catalyzed intramolecular Michael addition provides access to 4-substituted pipecolicacidderivatives. An efficient synthesis of 5-hydroxy-4-oxo-L-norvaline 7 and a new approach to the 4-oxo-L-ornithine
Burger, Klaus; Rudolph, Martin; Neuhauser, Horst, Liebigs Annalen der Chemie, 1991, # 12, p. 1365 - 1368
作者:Burger, Klaus、Rudolph, Martin、Neuhauser, Horst
DOI:——
日期:——
Hexafluoraceton als Schutzgruppen-und Aktivierungsreagenz in der Aminosäure-und Peptidchemie, 11. Mitt.: Ein neuer präparativ einfacher Zugang zu 2,5-Dioxopiperazinen und 2,5-Dioxomorpholinen
2,5-Dioxopiperazines with symmetrical as well as unsymmetrical substituent pattern can be obtained via 2,2-bis(trifluoromethyl)-1,3-oxazolidin-5-ones, and 2,5-dioxomorpholines via 2,2-bis-(trifluoromethyl)-1,3-dioxolan-4-ones, respectively.