منابع مشابه
Stereochemistry of decarboxylation of trans-4-hydroxycinnamic acid by Aerobacter.
The stereochemistry of the decarboxylation of trans-p-coumaric acid to 4-hydroxystyrene by Aerobacter aerogenes has been examined. The decarboxylation has been found to proceed with retention of the geometry about the trans-substituted double-bond.
متن کاملSelective Mixed Tishchenko Reaction via Substituted 1,3-Dioxan-4-ols
Monoesters of 1,3-diols can be prepared with the mixed Tishchenko reaction from â-hydroxy aldehydes and another aldehyde. These two aldehydes form a diastereomeric mixture of 1,3-dioxan-4-ol hemiacetal derivatives which can be further converted to monoesters with suitable catalysts. Limitations in the formation and esterification of this hemiacetal intermediate have been investigated in this wo...
متن کاملthe effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
Multiple hydride reduction pathways in isoflavonoids
BACKGROUND Isoflavonoids are of interest owing to their appearance in metabolic pathways of isoflavones, and their estrogenic and other physiological properties, making them promising lead compounds for drug design. RESULTS The reduction of isoflavones by various hydride reagents occurs by a 1,4-pathway in contrast to ordinary beta-alkoxy-alpha,beta-unsaturated ketones. Isoflavan-4-ones, cis-...
متن کاملAbsolute Stereochemistry of the Diepoxins
The exciton coupled CD method has been applied to determine the absolute configuration of the diepoxins, spiroketaI-linked naphthodiepoxydecaIinones of fungal origin. The CD spectra of the bis-dimethylaminobenzoate derivatives of the diepoxins 71, land ~c, reveal a positive chiral twist between the two substituted hydroxyl groups and thus infer the $ configuration at both of these stereogenic c...
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ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1965
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.38.2187