Electroorganic chemistry. 140. Electroreductively promoted intra- and intermolecular couplings of ketones with nitriles.
摘要:
Electroreduction of gamma and delta-cyano ketones in i-PrOH with Sn cathode gave alpha-hydroxy ketones and their dehydroxylated ketones as the intramolecularly coupled products. Guaiazulene, (-)-valeranone, polyquinanes, dihydrojasmone, methyl dihydrojasmonate, and rosaprostol have been synthesized by utilizing this electroreductive intramolecular coupling of gamma and delta-cyano ketones in one of the key steps. Similarly, electroreduction of a mixture of ketone and nitrile gave the corresponding intermolecularly coupled product. The product obtained by the electroreductive intermolecular coupling of (+)-dihydrocarvone with acetonitrile has been found to be the precursor of an effective chiral ligand for the enantioselective addition of diethylzinc to aldehydes.
Method of using substituted pyrazolo [1,5-a] pyrimidines
申请人:Wang Daniel Yanong
公开号:US20060063784A1
公开(公告)日:2006-03-23
This invention relates to novel methods of use of certain pyrazolo[1,5-a]pyrimidine compounds and the therapeutically acceptable salts thereof. This invention also relates to novel methods of using these compounds as anti-proliferative agents in mammals, including humans.
Substituted pyrazolo[1,5-a] pyrimidines and process for making same
申请人:Wang Daniel Yanong
公开号:US20060063785A1
公开(公告)日:2006-03-23
This invention relates to novel pyrazolo[1,5-a]pyrimidine compounds and the therapeutically acceptable salts thereof. These compounds are useful as anti-proliferative agents in mammals, including humans.
development of expeditious methods to synthesize these skeletons remains a challenging task. In this work, the catalyticcyclization of biomass-derived 2-furylcarbinols with an azide to form fused triazoles is described. This approach takes advantage of a single catalyst Yb(OTf)3 and operates via a furfuryl-cation-induced intramolecular [3 + 2] cycloaddition/furan ring-opening cascade.