157371-83-0Relevant academic research and scientific papers
Approaches to α-amino acids via rearrangement to electron-deficient nitrogen: Beckmann and Hofmann rearrangements of appropriate carboxyl-protected substrates
Chandrasekhar, Sosale,Mohana Rao
, p. 1393 - 1399 (2012/10/30)
The titled approaches were effected with various 2-substituted benzoylacetic acid oximes 3 (Beckmann) and 2-substituted malonamic acids 9 (Hofmann), their carboxyl groups being masked as a 2,4,10-trioxaadamantane unit (an orthoacetate). The oxime mesylates have been rearranged with basic Al2O3 in refluxing CHCl3, and the malonamic acids with phenyliodoso acetate and KOH/MeOH. Both routes are characterized by excellent overall yields. Structure confirmation of final products was conducted with X-ray diffraction in selected cases. The final N-benzoyl and N-(methoxycarbonyl) products are α-amino acids with both carboxyl and amino protection; hence, they are of great interest in peptide synthesis.
A β,β,β-Trialkoxyethyllithium Stable towards Fragmentation: a Carboxyl Protected Acetic Acid Dianion Equivalent
Chandrasekhar, Sosale,Roy, Chandra Deo
, p. 8099 - 8102 (2007/10/02)
The novel alkyllithium 1b is not only intriguinly stable towards fragmentation, but also a synthetically useful reagent, complementing current carboxylic ester enolate methodology.Its design is based on interesting mechanistic principles, and harnesses the known stability of the 2,4,10-trioxaadamantane framework.
