Rhodium-Catalyzed Intermolecular Cyclopropanation of Benzofurans, Indoles, and Alkenes via Cyclopropene Ring Opening
作者:Rachel J. Ross、Rubaishan Jeyaseelan、Mark Lautens
DOI:10.1021/acs.orglett.0c01655
日期:2020.6.19
The generation of metal carbenoids viaringopening of cyclopropenes by transition metals offers a simple entry into highly reactive intermediates. Herein, we describe a diastereoselective intermolecular rhodium-catalyzed cyclopropanation of heterocycles and alkenes using cyclopropenes as carbene precursors with a low loading of a commercially available rhodium catalyst. The reported method is scalable
[EN] NOVEL TRICYCLIC CALCIUM SENSING RECEPTOR ANTAGONISTS FOR THE TREATMENT OF OSTEOPOROSIS<br/>[FR] NOUVEAUX ANTAGONISTES TRICYCLIQUES DU RÉCEPTEUR SENSIBLE AU CALCIUM POUR LE TRAITEMENT DE L'OSTÉOPOROSE
申请人:MERCK SHARP & DOHME
公开号:WO2015089842A1
公开(公告)日:2015-06-25
Novel tricyclic compounds of the formula (I): and pharmaceutically acceptable salts thereof are disclosed as useful for treating or preventing osteoporosis and similar conditions. The compounds are effective as calcium sensing receptor antagonists. Pharmaceutical compositions and methods of treatment are also included.
Intramolecular Formal<i>anti</i>-Carbopalladation/Heck Reaction: Facile Domino Access to Carbo- and Heterooligocyclic Dienes
作者:Martin Pawliczek、Bastian Milde、Peter G. Jones、Daniel B. Werz
DOI:10.1002/chem.201502327
日期:2015.8.24
An intramolecular domino process consisting of a formal anti‐carbopalladation followed by Heck reaction is realized. Complex oligo(hetero)cyclic scaffolds are efficiently obtained in one synthetic step from easily obtainable enyne precursors. In contrast to common syn‐carbopalladation reactions of alkyne units, the carbopalladation employed here is designed to afford an anti‐arrangement of the two