Conversion of cycloalk-2-enones into 2-methylcycloalkane-1,3-diones—assessment of various Tamao-Fleming procedures and mechanistic insight into the use of the Me3SiMe2Si unit
Asymmetric Hydrogenation of Racemic 6-Aryl 1,4-Dioxaspiro[4.5]decan-7-ones to Functionalized Chiral β-Aryl Cyclohexanols via a Dynamic Kinetic Resolution
asymmetric hydrogenation method for the synthesis of functionalized β-aryl cyclohexanols is described. With chiral spiro ruthenium catalyst (Ra,S,S)-5c, a series of racemic α-aryl cyclohexanones bearing a β-monoethylene ketal group were hydrogenated to the corresponding functionalized β-aryl cyclohexanols in high yields with enantioselectivity of up to 99% ee via a dynamic kinetic resolution. This protocol
Nangia, A.; Chandrakala, P. S., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1994, vol. 33, # 6, p. 516 - 519
作者:Nangia, A.、Chandrakala, P. S.
DOI:——
日期:——
Direct asymmetric α-hydroxylation of 2-hydroxymethyl ketones
作者:Anne Paju、Tõnis Kanger、Tõnis Pehk、Margus Lopp
DOI:10.1016/s0040-4020(02)00760-3
日期:2002.9
A direct alpha-hydroxylation of racemic 2-hydroxymethyl ketones with the Sharpless epoxidation catalyst resulted in alpha,beta-dihydroxy ketones in high ee (up to 97%) and in moderate to good isolated yield (up to 58%). (C) 2002 Elsevier Science Ltd. All rights reserved.
VOLPE T.; REVIAL G.; PFAU M.; DANGELO J., TETRAHEDRON LETT., 27,(1986) N 25, 2853-2854