537004-90-3

Upstream product

• 537004-87-8 2-[7-benzyloxy-2,2-dimethyl-6-(2,2,7,7-tetramethyl-tetrahydro-bis[1,3]dioxolo[4,5-b;4',5'-d]pyran-5-ylmethoxy)-tetrahydro-[1,3]dioxolo[4,5-c]pyran-4-ylmethoxy]-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol 
• 537004-83-4 acetic acid 4,5-diacetoxy-6-acetoxymethyl-2-[7-benzyloxy-2,2-dimethyl-6-(2,2,7,7-tetramethyl-tetrahydro-bis[1,3]dioxolo[4,5-b;4',5'-d]pyran-5-ylmethoxy)-tetrahydro-[1,3]dioxolo[4,5-c]pyran-4-ylmethoxy]-tetrahydro-pyran-3-yl ester 
• 3068-32-4 1-bromo-1-deoxy-2,3,4,6-tetra-O-acetyl-a-D-galactopyranoside 
• 249511-82-8 2-O-benzyl-3,4-O-isopropylidene-β-D-galactopyranosyl-(1-> 6)-1,2:3,4-di-O-isopropylidene-α-D-galactopyranose 
• 537004-89-0 C₄₃H₆₄O₁₈ 

Relevant academic research and scientific papers

Synthesis of an arabinogalactan-type octa- and two isomeric nonasaccharides. Suitable tuning of protecting groups

An arabinogalactan-type double-branched octa- and two isomeric nonasaccharides were synthesized using the (2-naphthyl)methyl (NAP) and the acid sensitive but base stable (methoxydimethyl)methyl (MIP) protecting groups. The β-(1→6)-linked hexagalactan skeleton was synthesized having a benzyl and a (2-naphthyl)methyl (NAP) group at positions 2 of the second and the penultimate galactopyranosyl units, and this made possible sequential introduction of α-L-arabinofuranosyl or α-L-arabinofuranosyl-(1→5)-α-L-arabinofuranosyl side chains.

Formation of indole nucleus via intramolecular cyclization of aminophenylpropenyltriphenylphosphonium salts with one-carbon degradation

Treatment of 3-(2-aminophenyl)-2-propenyltriphenylphosphonium bromide with acid anhydride and tertiary amine affords 1,3-diacylindoles in yields ranging from 22 to 64%. A plausible mechanism of this new cyclization reaction is described.