Sulfur-controlled and rhodium-catalyzed formal (3 + 3) transannulation of thioacyl carbenes with alk-2-enals and mechanistic insights
作者:Qiuyue Wu、Ziyang Dong、Jiaxi Xu、Zhanhui Yang
DOI:10.1039/d1ob00116g
日期:——
A rhodium-catalyzed denitrogenative formal (3 + 3) transannulation of 1,2,3-thiadiazoles with alk-2-enals is achieved and a mechanistic investigation is performed, with an inverse KIE of 0.49 obtained.
derived alcohols, acetals, and methyl esters after simple (Mg, MeOH) well‐established protocols. Application of the procedure to the synthesis of biologically relevant phenethyl building blocks is shown. Most interestingly, α‐alkylation of initially obtained bis(sulfone) adducts can be done even with less reactive alkylating reagents, such as long linear‐chain or branched‐chain alkyl halides. Accordingly
Octanoic acid derivative to treat fibromyalgia and other pains
申请人:Warner-Lambert Company LLC
公开号:EP2172197A1
公开(公告)日:2010-04-07
The invention relates to the use of (3S,5R)-3-aminomethyl-5-methyloctanoic acid, or a pharmaceutically acceptable salt thereof, for the manufacture of a medicament for the treatment of a mammal for a disorder selected from fibromyalgia, abdominal or gynaecological pain, and pain caused by increased bladder contractions.
Enantio‐ and Diastereoselective Copper‐Catalyzed Allylboration of Alkynes with Allylic
<i>gem</i>
‐Dichlorides
作者:Andrea Chaves‐Pouso、Andrés M. Álvarez‐Constantino、Martín Fañanás‐Mastral
DOI:10.1002/anie.202117696
日期:2022.6.7
AbstractAllylic gem‐dichlorides are shown to be efficient substrates for catalytic asymmetric allylboration of alkynes. The method employs a chiral NHC−Cu catalyst capable of generating in a single step chiral skipped dienes bearing a Z‐alkenyl chloride, a trisubstituted E‐alkenyl boronate and a bis‐allylic stereocenter with excellent levels of chemo‐, regio‐ enantio‐ and diastereoselectivity. This high degree of functionalization makes these products versatile building blocks as illustrated with the synthesis of several optically active compounds. DFT calculations support the key presence of a metal cation bridge ligand–substrate interaction and account for the stereoselectivity outcome.
Traceless Rhodium-Catalyzed Hydroacylation Using Alkyl Aldehydes: The Enantioselective Synthesis of β-Aryl Ketones
作者:Anaïs Bouisseau、Ming Gao、Michael C. Willis
DOI:10.1002/chem.201604035
日期:2016.10.24
A one‐pot three‐step sequence involving Rh‐catalyzed alkene hydroacylation, sulfide elimination and Rh‐catalyzed aryl boronic acid conjugate addition gave products of traceless chelation‐controlled hydroacylation employing alkyl aldehydes. The stereodefined β‐aryl ketones were obtained in good yields with excellent control of enantioselectivity. Good variation of all three reaction components is possible