Absolute configurations of (−)-14-methylhexadec-8-cis-en-1-ol and methyl (−)-14-methylhexadec-8-cis-enoate, the sex pheromone of female dermestid beetle
The (S)-enantiomers of (Z)- and (E)-14-methyl-8-hexadecen-1-ol, 1 and 4, respectively, and of (Z)- and (E)-14-methyl-8-hexadecenal, 6 and 7, respectively, which are sex pheromone components of dermestid beetles, have been synthesized in high optical purity starting from opticallypure (S)-2-methyl-1-butanol. The preparation of 1 has been carried out using a new general method for reducing stereoselectively
Volatile Lactones — (5S,S)-5-Methyl-3-(methylalkyl)furan-2(5H)-ones — Identified in the Submerged Cultivation ofStreptomyces Avermitilis
作者:Tomáš Řezanka、Karel Sigler
DOI:10.1002/ejoc.200600343
日期:2006.9
Six new compounds have been identified in the volatile fractions produced during the submergedcultivation of Streptomyces avermitilis. By recording the GC/MS, GC/FTIR, CD, 1H and 13C NMR data and by performing chemical degradation experiments, these compounds were determined to be (5S,S)-5-methyl-3-(methylalkyl)furan-2(5H)-ones. Herein, the existence of volatilelactones with an anteiso structure of
Halogen-containing, optically active liquid crystal compound and liquid crystal composition containing same
申请人:Chisso Corporation
公开号:EP0197677A2
公开(公告)日:1986-10-15
A novel optically active liquid crystal compound and a liquid crystal composition containing the same are provided, which compound is expressed by the formula
wherein R1 is alkyl or alkoxy of 4 - 18 C; R2 is alkyl, alkoxy, acyl or alkoxymethyl of 4 - 18C; but either one of R1 or R2 is an optically active group; either one of X1 or X2 is halogen atom and the other is H; m and n each are 0 or 1 and m+n is 0 or 1.
Halogen-containing heterocyclic compounds and liquid crystal compositions containing them
申请人:Chisso Corporation
公开号:EP0233706A2
公开(公告)日:1987-08-26
Liquid crystalline, halogen-containing heterocyclic compounds, useful in liquid crystal composition have the formula:
in which R₁ and R₂ and each represent a C₂-C₁₈ alkyl group, X is -N= or =CH=; Y is F or Cℓ; n is 0 or an integer of l to l0; and the symbol* indicates an asymmetric carbon atom.
Chattopadhay, S.; Mamdapur, V. R.; Chadha, M. S., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1989, vol. 28, # 1-11, p. 848 - 849