58716-92-0

Upstream product

• 250665-99-7 [2S,1'S,2'S]-(+)-2-amino-N-(2'-hydroxy-1'-methyl-2'-phenylethyl)-N-methyl-2-(3,4,5-trimethoxyphenyl)acetamide 
• 247118-51-0 (+)-<1'S,2'S>-N-(2'-hydroxy-1'-methyl-2'-phenylethyl)-N-methyl-2-(3,4,5-trimethoxyphenyl)acetamide 
• 250665-95-3 [2S,1'S,2'S]-(+)-2-[N,N'-bis(1,1-dimethylethoxycarbonyl)hydrazino]-N-(2'-hydroxy-1'-methyl-2'-phenylethyl)-N-methyl-2-(3,4,5-trimethoxyphenyl)acetamide 
• 86-81-7 3,4,5-trimethoxy-benzaldehyde 
• 203504-53-4 (R)-(-)-N-(3,4,5-trimethoxybenzylidene)-p-toluenesulfinamide 

Relevant academic research and scientific papers

Asymmetric synthesis of arylglycines and their use as chiral templates for the stereocontrolled synthesis of 7,8-disubstituted 3-Aryl-1,2,3,4-tetrahydroisoquinolin-4-ols

A synthetic technique for the asymmetric synthesis of arylglycines has been optimized, reaching the target amino acids in only four steps with good yields and with enantiomeric excesses higher than 99%. The key step consisted of a stereocontrolled electrophilic amination reaction of (S,S)-(+)-pseudoephedrine-based arylacetamide enolates with di-tertbutylazodicarboxylate. The arylglycines thus obtained turned out to be excellent chiral templates for the production of chiral, nonracemic 7,8-disubstituted 3-aryl-1,2,3,4-tetrahydroisoquinolines, through use of a synthetic sequence involving: (1) reduction of the arylglycines to the parent arylglycinols, (2) N-benzylation with appropriately substituted aromatic aldehydes and (3) Swern oxidation followed by acid catalysed cyclization of the obtained a-amino aldehydes.

Asymmetric synthesis of arylglycine amino acids using (S,S)-(+)- pseudoephedrine derived amides

Arylglycine aminoacids were obtained in good yields and with enantiomeric excesses higher than 99% by using an asymmetric amination reaction protocol on (S,S)-(+)-pseudoephedrine based arylacetamide enolates with di-tert-butylazodicarboxylate. Subsequent hydrazinolysis and hydrolysis yielded the target aminoacids.

Sulfinimine-mediated asymmetric synthesis of (R)-(4-methoxy-3,5-dihydroxyphenyl)glycine: The central amino acid of vancomycin and related agents

The sulfinimine asymmetric Strecker synthesis, the addition of ethyl aluminum cyano alkoxide, 'EtAl(OR)CN' to sulfinimine 10, has been applied to a concise highly efficient four-step enantioselective synthesis of (R)-(4-methoxy-3,5-dihydroxyphenyl)glycine (3) and its derivatives in >97% ee. These epimerization-sensitive arylglycines are precursors of the key central amino acid of vancomycin and related glycopeptide antibiotics.