Asymmetric dihydroxylation of linalool, nerolidol and citronellyl acetate. Enantioselective synthesis of (3S, 6S)-tetrahydro-2,2,6-trimethyl-6-vinyl-2H-pyran-3-ol
摘要:
The asymmetric Sharpless' dihydroxylation of linalool, citronellyl acetate and nerolidol was investigated. High diastereo-. enantio- and positional selectivity was observed for the first two terpenes. A highly diastereo- and enantioselective synthesis of (3S,6S)-tetrahydro- 2,2,6-trimethyl - 6-vinyl-2H -pyran-3-ol is described.
Heteroatom-Directed Acylation of Secondary Alcohols To Assign Absolute Configuration
作者:Alexander S. Burns、Christopher C. Ross、Scott D. Rychnovsky
DOI:10.1021/acs.joc.7b03156
日期:2018.3.2
is effective for the enantioselectiveacylation and kineticresolution of benzylic secondaryalcohols. The enantioselectiveacylation has now been extended to secondaryalcohols bearing electron-withdrawing groups such as halides and other heteroatoms. The level of selectivity is modest to good and is sufficient for determining configuration using the competing enantioselective conversion method. A
Asymmetric dihydroxylation of linalool, nerolidol and citronellyl acetate. Enantioselective synthesis of (3S, 6S)-tetrahydro-2,2,6-trimethyl-6-vinyl-2H-pyran-3-ol
The asymmetric Sharpless' dihydroxylation of linalool, citronellyl acetate and nerolidol was investigated. High diastereo-. enantio- and positional selectivity was observed for the first two terpenes. A highly diastereo- and enantioselective synthesis of (3S,6S)-tetrahydro- 2,2,6-trimethyl - 6-vinyl-2H -pyran-3-ol is described.
Water-Soluble Constituents of Coriander.
作者:Toru Ishikawa、Kyoko Kondo、Junichi Kitajima
DOI:10.1248/cpb.51.32
日期:——
From the water-soluble portion of the methanol extract of coriander (fruit of Coriandrum sativum L.), which has been used as a spice and medicine since antiquity, 33 compounds, including two new monoterpenoids, four new monoterpenoid glycosides, two new monoterpenoid glucoside sulfates and two new aromatic compound glycosides were obtained. Their structures, were clarified by spectral investigation.