55362-75-9Relevant academic research and scientific papers
Synthesis of arylglycine and mandelic acid derivatives through carboxylations of α-amido and α-acetoxy stannanes with carbon dioxide
Mita, Tsuyoshi,Sugawara, Masumi,Hasegawa, Hiroyuki,Sato, Yoshihiro
experimental part, p. 2159 - 2168 (2012/06/01)
Incorporation reactions of carbon dioxide (CO2) with N-Boc-α-amido and α-acetoxy stannanes were developed using CsF as a mild tin activator. Monoprotected α-amido stannanes could be used, and the corresponding arylglycine derivatives were obtained in moderate-to-high yields under 1 MPa (10 atm) of CO2 pressure. α-Acetoxy stannanes also underwent carboxylation to afford mandelic acid derivatives in excellent yields under ambient CO2 pressure. Both transformations enabled the synthesis of α-tertiary and α-quaternary carboxylic acid derivatives. In addition, the chirality of (S)-N-tert-butylsulfonyl-α- amido stannanes was transferred with up to 90% inversion of configuration at 100 °C.
Highly enantioselective synthesis of orthogonally protected (2S)-2,3-diaminopropanoates through catalytic phase-transfer aza-Henry reaction
Kumaraswamy, Gullapalli,Pitchaiah, Arigala
, p. 1543 - 1550 (2011/10/08)
The syntheses of enantiomer-enriched orthogonally protected different (2S)-2,3-diaminopropanoates and unnatural furyl-substituted (tert-butoxy) carbonyl (Boc) as well as (benzyloxy)carbonyl (Cbz) protected amino acid esters are accomplished by means of an
One-pot synthesis of α-amino acids from imines through CO2 incorporation: An alternative method for strecker synthesis
Mita, Tsuyoshi,Chen, Jianyang,Sugawara, Masumi,Sato, Yoshihiro
supporting information; experimental part, p. 1393 - 1396 (2011/04/22)
Itas a gas: A novel one-pot process for the synthesis of α-amino acids from imine equivalents using CO2 gas as a carbon source has been developed. This reaction was made possible by the reagent combination of TMSSnBu3 and CsF (see scheme). Three successive reactions (imine formation, stannylation, and carboxylation) proceeded in the same flask under these conditions to give products in up to 79 % yield. Boc=tert-butoxycarbonyl, TMS=trimethylsilyl.
Enantioselective synthesis of dihydrofuranylglycine, furanylglycine, furanylalanine and homo-furanylalanine derivatives
Chattopadhyay, Shital K.,Sarkar, Kaushik,Karmakar, Swastik
, p. 2083 - 2085 (2007/10/03)
Enantiomerically pure nor-furanomycin, furanylglycine, furanylalanine and homo-furanylalanine derivatives were prepared from appropriate amino acid derived dienes using ring-closing metathesis as the key step. Georg Thieme Verlag Stuttgart.
