摘要:
The present invention is directed toward efficient, high-yield processes for making ascorbic acid, 2-keto-L-gulonic acid, and esters of 2-keto-L-gulonic acid. The processes comprise reacting the appropriate starting materials with a hydrolase enzyme catalyst such as a protease, an esterase, a lipase or an amidase.
摘要:
A method for preparing aromatic substances having formula (I), wherein a substrate of formula (II) or an isomer of these precursors, also termed a substrate, in particular selected from those of formula (III), in which formulae R.sub.1 may be a --CH3, --CH2OH, --CHO, --COOH, or (a) radical, R.sub.2 may be a --H, --OH or --O--CH3 radical R.sub.3 may be a --H, --OH or --O--CH3 radical, and R.sub.2 and R.sub.3 may form a methylenedioxy bridge (b), is exposed to the activity of a lipoxygenase. ##STR1##
摘要:
The invention relates to a process for the preparation of ascorbic acid-2-phosphate, which comprises reacting ascorbic acid or araboascorbic acid with ATP to produce ascorbic acid-2-phosphate in an aqueous medium in the presence of an effective amount of an enzyme derived from a microorganism and capable of catalyzing the enzymatic reaction of ascorbic acid or araboascorbic acid with ATP to produce ascorbic acid-2-phosphate and recovering the resultant ascorbic acid-2-phosphate from the reaction solution.
摘要:
A process for production of 15-alpha-hydroxyprostaglandin intermediates of formula I ##STR1## wherein X is CH.sub.2,A is trans --CH.dbd.CH--B is ethylenedioxy or 2,2-dimethylpropylenedioxy,R.sub.1 is benzoyl, andR.sub.2 is ##STR2## by treating a ketone of formula II ##STR3## wherein A, B, X, R.sub.1 and R.sub.2 have the meanings indicated above, with a culture of Candida solani (NCYC 41) and isolating the resulting 15-alpha-hydroxyprostaglandin intermediate.
摘要:
Alcohols of the formula ##STR1## wherein R.sup.1 and R.sup.2 are each independently methyl or ethyl or together signify pentamethylene, formed by the enzymatic hydrolysis of a corresponding (RS) alkanoic acid ester are intermediates for Vitamin E.
摘要:
This invention relates to pharmaceutical compounds of structural formula (I): ##STR1## and compositions and methods of treatment utilizing these compounds to inhibit farnesyl protein transferase and farnesylation of the oncogene protein Ras.
摘要:
Alcohols of the formula ##STR1## wherein R.sup.1 and R.sup.2 are each independently methyl or ethyl or together signify pentamethylene,formed by the enzymatic hydrolysis of a corresponding (RS) alkanoic acid ester are intermediates for Vitamin E.
摘要:
Described is a process for the preparation of compositions of matter containing octalactones defined according to the structure: ##STR1## which includes the stereoisomers having the structures: ##STR2## by means of the sequential steps of (i) fermentation of caprylic acid or the ethyl ester of caprylic acid defined according to the generic structure: ##STR3## wherein R is hydrogen or ethyl using a microorganism selected from the group consisting of:Mortierella isabellina, ATCC 44583;Mortierella isabellina, ATCC 38063;Syncephalastrum racemosum, NRRL A-5889;Mortierella isabellina, IFO 7884;Mortierella ramanniana var. angulispora, IFO 8187;Mortierella isabellina, CBS 221.29; andMortierella isabellina, IFO 7873whereby gamma hydroxy octanoic acid or ester thereof defined according to the structure: ##STR4## is formed; and (ii) lactonization of the resulting gamma hydroxy octanoic acid by means of simultaneous acidification and heating according to the reaction sequence: ##STR5##
摘要:
The novel triacetylenic dioxolone antifungal compound of this invention is isolated from the EV-22 complex of this invention which is elaborated by the microorganism Microbispora sp. SCC 1438, ATCC 53620.
摘要:
A process for the preparation of gamma and delta lactones from organic carboxylic acids or derivatives thereof is disclosed. The process comprises cultivating, under aerobic conditions, a fungus of the genus Mucor in a suitable medium containing the carboxylic acid or a derivative thereof.