Compositions containing certain bicyclic lactones and having insect repellent properties are disclosed. Such compositions comprise a compound of the formula:
or the corresponding unsaturated compound thereof having the formula:
wherein R, R', R" and R''' each are lower alkyl or hydrogen; wherein y is an integer from 1-3, and x and z each are 0 or 1, with the proviso that y is 1 or 2 when x is 1; and a carrier. A method of using such a repellent composition to repel an insect from a situs comprises applying to such situs an effective amount of the composition, with or without the carrier, and thereby repelling the insect from the situs.
Glucagon-like peptide 1 modulator and uses thereof
申请人:Academia Sinica
公开号:US10392357B2
公开(公告)日:2019-08-27
Disclosed herein are novel glucagon-like peptide-1 (GLP-1) modulators and their uses in manufacturing medicaments for the treatment and/or prophylaxis of diseases and/or disorders associated with hyperglycemia.
The First Stereoselective Palladium-Catalyzed Cyclocarbonylation of β,γ-Substituted Allylic Alcohols
作者:Melanie Brunner、Howard Alper
DOI:10.1021/jo9702709
日期:1997.10.1
beta,gamma-Substituted allylic alcohols react with CO in the presence of catalytic quantities of palladium acetate and 1,4-bis(diphenylphosphino)butane affording alpha,beta-substituted-gamma-butyrolactones in 42-85% isolated yields. The complete stereoselectivity observed in some cases is a significant feature of the lactonization reaction, with (E)-allylic alcohols affording trans-disubstituted lactones. Depending on the structure of the allylic alcohol used in the cyclocarbonylation reaction, the formation of the corresponding alkene or the beta,gamma-unsaturated carboxylic acid was observed as a side or the principal reaction.
Charlesworth; McRae; MacFarlane, Canadian Journal of Research, Section B: Chemical Sciences, 1943, vol. 21, p. 55,60
作者:Charlesworth、McRae、MacFarlane
DOI:——
日期:——
CLIVE, D. L. J.;BEAULIEU, P. L., J. CHEM. SOC. CHEM. COMMUN., 1983, N 6, 307-309