Detail of "928-68-7"

Reference

Optically active alkanoic and alkenoic monocarboxylic acids

Optically active alkanoic and alkenoic monocarboxylic acids. (Hoffmann-La Roche, F., und Co., A.In this study， 928-68-7 and 60148-90-5 are also used.-G., Switz.). Neth. Appl. NL 7512729 4 May 1976, 23 pp. (Dutch). (Netherlands). CODEN: NAXXAN. CLASS: IC: C07C051-36. PRIORITY: US 74-519442 31 Oct 1974. DOCUMENT TYPE: Patent CA Section: 30 (Terpenoids) Section cross-reference(s): 23 Substituted acrylic acids are subjected to enantioselective catalytic hydrogenaation of the .alpha.,.beta.-double bond in the presence of Rh complexes of chiral tertiary phosphines to give intermediates of chiral vitamin E, citronellal, or menthol. Thus, Me2C:CHCH2CH2CMe:CHCO2H (E:Z .apprxeq.9) was hydrogenated in the presence of neomenthyldiphenylphosphine and .mu.,.mu.'-dichlorobis[1,5-cyclooctadienylrhodium(I)] to give 95% 3R-(+)-Me2C:CHCH2CH2CHMeCH2CO2H. .