113299-32-4

Upstream product

• 133491-12-0 (3aS,4S,6R,6aR)-6-Methoxymethoxymethyl-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxol-4-ol 
• 115384-58-2 6-<(methoxymethoxy)methyl>-2,2-dimethyl-3aβ,5,6α,6aβ-tetrahydro-4H-cyclopenta-1,3-dioxol-4-one 
• 112543-75-6 (3aR,4S,5S,6aS)-5-Hydroxymethyl-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxol-4-ol 
• 105265-91-6 (3aS,6aS)-4-Acetoxy-2,2-dimethyl-tetrahydro-cyclopenta[1,3]dioxole-5,5-dicarboxylic acid dimethyl ester 
• 105265-92-7 methyl (3R,4S)-3,4-(isopropylidenedioxy)-1-cyclopentene-1-carboxylate 
• 105265-93-8 (3R,4S)-3,4-(isopropylidenedioxy)-1-cyclopentene-1-methanol 

Relevant academic research and scientific papers

A Novel Transformation of Four Aldoses to Some Optically Pure Pseudohexopyranoses and a Pseudopentofuranose, Carboxylic Analogues of Hexopyranoses and Pentofuranose. Synthesis of Derivatives of (1S,2S,3R,4S,5S)-, (1S,2S,3R,4R,5S)-, (1R,2R,3R,4R,5S)-, (1S,

Knoevenagel reactions with dimethyl malonate of the suitably protected acylic aldehydes 6, 20, 34, and 46, which were prepared from D-ribose, D-xylose, D-arabinose, and D-erythrose, respectively, proceeded smoothly to provide α,β-unsaturated diesters 7, 2

Synthesis of all stereoisomeric carbapentofuranoses

All carbocyclic analogs of the pentofuranoses were synthesized starting from norborn-5-en-2-one (1). By using either base- or acid-catalyzed Baeyer- Villiger reaction of 1, the central intermediates 2 and 3 were obtained. The required functionalization of the olefinic double bond was achieved either by cis-hydroxylation in the case of the ribo, lyxo, and α-xylo derivatives or by epoxidation and subsequent opening with aqueous perchloric acid. In the latter case, a pronounced selectivity for opening the epoxy alcohol in the 3- position was found. I an epoxy acetate with both functions on the same side of the ring was used, the eposide was opened in the 2-position by neighboring group participation of the acetate. The requisite side chain degradation was accomplished either by conversion of the ester into an olefin and subsequent dihydroxylation/cleavage reaction or by Curtius rearrangement to the amine and its conversion into an acetate.

BIOSYNTHESIS OF ARISTEROMYCIN: EVIDENCE FOR THE INTERMEDIACY OF A 4β-HYDROXYMETHYL-1α,2α,3α-TRIHYDROXYCYCLOPENTANETRIOL.

Evidence for the intermediacy of a 4β-hydroxymethyl-1α,2α,3α-trihydroxycyclopentanetriol (5 or 6) in the biosynthesis of the nucleoside antibiotic aristeromycin (1) has been obtained by administration of doubly-labeled forms of D-glucose to the fermentation broth of Streptomyces citricolor followed by trapping of the tetrol 5 using isotope dilution methods.