110658-45-2

Upstream product

• 79-37-8 oxalyl dichloride 
• 110658-44-1 αS-(αR^*,βS^*,γS^*)-1benzyl-4,9-dihydro-β,γ-dihydroxy-α-<(methoxycarbonyl)amino>-4,6-dimethyl-9-oxo-1H-imidazo<1,2-a>purine-7-butanoic acid methyl ester 
• 96881-37-7 1-benzyl-7-formylwye 
• 96854-31-8 -4-<1-Benzyl-4,9-dihydro-4,6-dimethyl-9-oxo-1H-imidazo<1,2-a>purin-7-yl>-2-<(methoxycarbonyl)amino>-3-butenoic Acid Methyl Ester 

Downstream Products

• 35693-91-5 wybutine 
• 110582-32-6 *,R^*)>-4,9-dihydro-β-hydroxy-α-<(methoxycarbonyl)amino>-4,6-dimethyl-9-oxo-1H-imidazo<1,2-a>purine-7-butanoic acid methyl ester 

Relevant academic research and scientific papers

Synthesis of β-hydroxywybutines, the most probable alternatives for the hypermodified base of rat liver phenylalanine transfer ribonucleic acid

Deoxygenation of the 1,2-glycol (±)-5 was achieved at the position adjacent to the heterocycle through the cyclic carbonate (±)-14, providing the monohydroxy compound 6. This new method of regioselective deoxygenation was employed for the first synthesis

Studies towards the synthesis of the hypermodified nucleoside of rat liver phenylalanine transfer ribonucleic acid: Improved synthesis of the base β-hydroxywybutine

An improved synthesis of the key intermediates (3 and 8) for the synthesis of β-hydroxywybutines [[R(R*,S*)]- and [S-(R*,R*)]-4], the most probable structures for the minor base from rat liver tRNA(Phc), has been achieved by the Wittig reaction between 1-benzyl-7-formylwye (1) and the phosphorane derived from (R)-2[(methoxycarbonyl)amino]-3- (triphenylphosphonio)propanoate (10), followed by methylation, OsO4 oxidation, and cyclocondensation with COCI2 in the presence of pyridine. The racemic forms of β-hydroxywybutines [(R*,S*)- and (R*,R*)-4], which were required for the determination of the optical purity of [R-(R*,S*)]- and [S-(R*,R*)]-4 by means of chiral HPLC, were conveniently prepared through pyrolysis of the cyclic carbonate 3 followed by NaBH4 reduction and catalytic hydrogenolysis. The samples of [R-(R*,S*)]- and [S-(R*,R*)]-4 were thus shown to be optically pure.

Cyclocondensation of oxalyl chloride with 1,2-glycols

Oxalyl chloride reacts with a wide range of acyclic 1,2-glycols 1 in the presence of triethylamine to produce 1,3-dioxolan-2-ones 3 together with 1,4-dioxane-2,3-diones 2. Ethylene glycol (1d), monosubstituted ethylene glycols 1e, j-l, and erythro-1,2-disubstituted ethylene glycols 1f, m, o provide the cyclic carbonates 3 as the minor products, while the threo-compounds 1g, i, n, p, q and pinacol (1h) afford 3 as the main products. The formation of 3 may be rationalized in terms of stereoelectronically controlled cleavage of the conjugate base 17- of the tetrahedral intermediates. The rate of the conformational change of 17- into 18- and the equilibrium constant between these conformers are proposed to be the major factors affecting the reaction pattern.

SYNTHESIS OF OPTICALLY ACTIVE FORMS OF HYDROXY-Y BASE, THE MINOR COMPONENT OF RAT LIVER PHENYLALANINE TRANSFER RIBONUCLEIC ACID

-β-Hydroxywybutine (6) and its -isomer (9) have been synthesized as the most probable alternatives for hydroxy-Y base isolated from rat liver phenylalanine tRNA.