作者:Mihirbaran Mandal、Alexei Buevich、John P. Caldwell、Lynn Hyde、Xianhai Huang、Xiaoxiang Liu、Brian McKittrick、Robert D. Mazzola、Dmitri Pissarnitski、Anandan Palani、Lili Zhang、Eric Parker、Li Xiao、Diane Rindgen、Zhaoning Zhu
DOI:10.1021/acs.jmedchem.0c00446
日期:2020.8.13
when the substituents at 3 and 4 positions of the oxadiazine moiety adopt an α orientation (cf. 11). To address the concern around potential reactivity of the exocyclic double bond present in series I towardnucleophilic attack, compounds containing either an endocyclic double bond, such as 20 (series II), or devoid of an olefinic moiety, such as 27 (series III), were designed and validated as novel
[reaction: see text] N,N-Dialkyl-beta-amino alcohols derived from alpha-amino acids can be rearranged enantiospecifically by using TFAA/Et3N/NaOH to give 1,2-amino alcohols with enantiomeric excess up to 99%.
Treatment of <i>N,N</i>-Dibenzylamino Alcohols with Sulfonyl Chloride Leads to Rearranged β-Chloro Amines, Precursors to β-Amino Acids, and Not to Tetrahydroisoquinolines
作者:Klaus Weber、Stephan Kuklinski、Peter Gmeiner
DOI:10.1021/ol991402i
日期:2000.3.1
treatment with tosyl chlorides induced intramolecular Friedel-Crafts alkylation. Reexamination of the reactions in our laboratory clearly proved rearranged chloro amines instead of the initially assumed tetrahydoisoquinoline structures. The chloro amines investigated can be employed as highly useful intermediates for an EPC synthesis of beta-amino nitriles and beta-amino acids.