stereoselective total synthesis of (+)-pentalenene was achieved through the tandem cycloaddition reaction of the allenyl diazo substrate prepared from (+)-citronellal. The initial intramolecular [2+3] cycloaddition reaction between the diazo functionality and the allenyl group produced the trimethylenemethane (TMM) intermediate after immediate loss of nitrogen molecule from the cycloaddition intermediate.
Provided is a novel compound represented by the following formula
Wherein each symbol is as defined in the specification, or a salt thereof, which has an angiotensin II receptor antagonistic activity and a peroxisome proliferator-activated receptor γ agonistic activity, and is useful as an agent for the prophylaxis or treatment of circulatory diseases such as hypertension and the like and/or metabolic diseases such as diabetes and the like, and the like.
Cyclization into Hydrindanones Using Samarium Diiodide
作者:Masakazu Sono、Yasuyo Nakashiba、Katsuyuki Nakashima、Motoo Tori
DOI:10.1021/jo9918450
日期:2000.5.1
Samarium(II) iodide has been employed to promote vinylogous pinacol coupling reaction of aldehyde onto alpha,beta-unsaturated ketones. The diastereoselectivity of 6-endo products was changed by addition of a proton source and/or HMPA and by the reaction temperature. The cyclizationreactions described herein provide a general approach to the syntheses of 3,3-dimethylhydrindanes with a cis-relationship
The present invention relates to isoquinolinone derivatives of formula (I): wherein are as herein defined; processes for their preparation, pharmaceutical compositions containing them and their use in therapy.
NOVEL INDAZOLECARBOXAMIDES, PROCESSES FOR THEIR PREPARATION, PHARMACEUTICAL PREPARATIONS COMPRISING THEM AND THEIR USE FOR PRODUCING MEDICAMENTS
申请人:BAYER PHARMA AKTIENGESELLSCHAFT
公开号:US20160311833A1
公开(公告)日:2016-10-27
The present application relates to novel 6-substituted indazoles having a carboxamide side chain, to processes for their preparation, to their use alone or in combinations for the treatment and/or prophylaxis of diseases, and to their use for producing medicaments for the treatment and/or prophylaxis of diseases, in particular for the treatment and/or prophylaxis of endometriosis, lymphomas, macular degeneration, COPD and psoriasis.