Isopropyl 2-chloropropionate appears as a colorless liquid with a pungent odor. About the same density as water and insoluble in water. Vapors are heavier than air. May be toxic by ingestion and skin absorption.
Ni-catalyzed reductive coupling of α-halocarbonyl derivatives with vinyl bromides
作者:Canbin Qiu、Ken Yao、Xinghua Zhang、Hegui Gong
DOI:10.1039/c6ob02269c
日期:——
This work describes the vinylation of α-halo carbonyl compounds with vinylbromides under Ni-catalyzed reductive coupling conditions. While aryl-conjugated vinylbromides entail pyridine as the sole labile ligand, the alkyl-substituted vinylbromides require both bipyridine and pyridine as the co-ligands.
The first iron-catalyzed enantioselective cross-coupling reaction between an organometallic compound and an organic electrophile is reported. Synthetically versatile racemic α-chloro- and α-bromoalkanoates were coupled with aryl Grignard reagents in the presence of catalytic amounts of an iron salt and a chiral bisphosphine ligand, giving the products in high yields with acceptable and synthetically
Manganese-Promoted Regioselective Ring-Opening of 2,3-Epoxy Acid Derivatives: A New Route to α-Hydroxy Acid Derivatives
作者:José M. Concellón、Pablo L. Bernad、Humberto Rodríguez-Solla、Pamela Díaz
DOI:10.1002/adsc.200900257
日期:2009.9
amides as starting materials, the corresponding 3-aryl-2-hydroxy amides in enantiopure form are also available. Some synthetic applications of selected examples of 3-aryl-2-hydroxy carboxylic acidderivatives are shown. A mechanism has been proposed to explain this novel reaction.
Synthesis of (E)-α,β-unsaturated esters with total diastereoselectivity by using chromium dichloride
作者:José M. Concellón、Humberto Rodrı́guez-Solla、Carmen Méjica
DOI:10.1016/j.tetlet.2004.02.011
日期:2004.3
Synthesis of di- and trisubstituted (E)-α,β-unsaturatedesters is easily achieved by using chromium dichloride through an elimination reaction of a diastereoisomeric mixture of α-halo-β-hydroxy esters. The starting materials were easily prepared by the aldol reaction of lithium enolates of α-chloroesters with aldehydes. A mechanism to explain this elimination process is proposed.
THE INFLUENCE OF SUBSTITUENTS ON THE EASE AND DIRECTION OF RING OPENING IN THE LiAlH<sub>4</sub>–AlCl<sub>3</sub> REDUCTIVE CLEAVAGE OF SUBSTITUTED 1,3-DIOXOLANES
作者:B. E. Leggetter、R. K. Brown
DOI:10.1139/v64-154
日期:1964.5.1
The room temperature hydrogenolysis by LiAlH4–AlCl3 of ether solutions of a number of 1,3-dioxolanes has been studied.Electron donor substituents on the C2 atom of the ring accelerate while electro...