329786-97-2

Upstream product

• 501-53-1 benzyl chloroformate 
• 47738-79-4 (S)-3-(1H-indol-3-yl)-2-(tritylamino)propanoic acid 
• 219646-54-5 3a-hydroxy-1-trityl-1,2,3,3a,8,8a-hexahydro-pyrrolo[2,3-b]indole-2-carboxylic acid tert-butyl ester 
• 329786-57-4 3a-hydroxy-1,2,3,3a,8,8a-hexahydro-pyrrolo[2,3-b]indole-2-carboxylic acid tert-butyl ester 
• 73-22-3 L-Tryptophan 
• 219646-53-4 N_b-trityl-L-tryptophan tert-butyl ester 
• 18162-48-6 tert-butyldimethylsilyl chloride 
• 329786-96-1 3a-hydroxy-2,3,3a,8a-tetrahydro-pyrrolo[2,3-b]indole-1,2,8-tricarboxylic acid 1,8-dibenzyl ester 2-tert-butyl ester 

Downstream Products

• 219646-86-3 (2S,3aR,8aR,2'S,3'aR,8'aR)-3a,3'a-Dihydroxy-2,3,3a,8a,2',3',3'a,8'a-octahydro-[5,5']bi[pyrrolo[2,3-b]indolyl]-1,2,8,1',2',8'-hexacarboxylic acid 1,8,1',8'-tetrabenzyl ester 2,2'-di-tert-butyl ester 
• 219646-59-0 (2S,3aR,8aR,2'S,3'aR,8'aR)-3a,3'a-Bis-(tert-butyl-dimethyl-silanyloxy)-2,3,3a,8a,2',3',3'a,8'a-octahydro-[5,5']bi[pyrrolo[2,3-b]indolyl]-1,2,8,1',2',8'-hexacarboxylic acid 1,8,1',8'-tetrabenzyl ester 2,2'-di-tert-butyl ester 
• 219646-88-5 (2S,3aR,8aR,2'S,3'aR,8'aR)-3a,3'a-Bis-triethylsilanyloxy-2,3,3a,8a,2',3',3'a,8'a-octahydro-[5,5']bi[pyrrolo[2,3-b]indolyl]-1,2,8,1',2',8'-hexacarboxylic acid 1,8,1',8'-tetrabenzyl ester 2,2'-di-tert-butyl ester 
• 219646-56-7 3a-(tert-butyl-dimethyl-silanyloxy)-5-iodo-2,3,3a,8a-tetrahydro-pyrrolo[2,3-b]indole-1,2,8-tricarboxylic acid 1,8-dibenzyl ester 2-tert-butyl ester 

Relevant academic research and scientific papers

Discovery through total synthesis: A retrospective on the himastatin problem

A total synthesis of a structure proposed for himastatin was accomplished. The non-identity of the fully synthetic material with himastatin necessitated a revision of the assigned structure. Confirmation of the revised stereostructure was subsequently confirmed through total synthesis. Among the achievements during this effort were i) stereospecific routes to both anti-cis and syn-cis pyrrolindoline substructures; ii) a practical synthesis to 5-hydroxypiperazic acid in enantiomerically pure form; iii) a Stille coupling leading to a complex bi-indole moiety,and iv) efficient protecting group management throughout the evolving depsipeptide domain. The outlines for a biological pharmacophore have been delineated. The alternating D- and L-substituents in the 6-mer as well as the biaryl linkage connecting the two identical subunits are critical for maintaining biological activity. This pattern is simulated in another antibiotic, and suggests a possible structural trend for future SAR investigations.