Palladium Catalyzed Alkoxy- and Aminocarbonylation of Vinyl Tosylates
作者:Diana C. Reeves、Sonia Rodriguez、Heewon Lee、Nizar Haddad、Dhileepkumar Krishnamurthy、Chris H. Senanayake
DOI:10.1021/ol200744s
日期:2011.5.6
The palladium catalyzed alkoxycarbonylation and aminocarbonylation of vinyl tosylates are described. A variety of ketone and aldehyde derived vinyl tosylates may be carbonylated in the presence of primary, secondary, and tertiary alcohols, or primary and secondary amines, to provide the corresponding esters and amides in good yields. The alkoxycarbonylation was applied to a short synthesis of isoguvacine
Palladium-catalyzed coupling of vinyl tosylates with arylsulfinate salts
作者:Diana C. Reeves、Sonia Rodriguez、Heewon Lee、Nizar Haddad、Dhileep Krishnamurthy、Chris H. Senanayake
DOI:10.1016/j.tetlet.2009.03.174
日期:2009.6
The first palladium-catalyzedcoupling of vinyl tosylates with arylsulfinate salts is described. A variety of cyclic and acyclic vinyl tosylates were coupled with aryl sulfinate salts using 2.5 mol % Pd2(dba)3/5.0 mol % XantPhos to give vinyl aryl sulfone products in good yields. The coupling was extended to the preparation of a cyclopropyl vinyl sulfone.
Suzuki–Miyaura cross-coupling of alkenyl tosylates with alkenyl MIDA boronates
作者:Monique Lüthy、Richard J.K. Taylor
DOI:10.1016/j.tetlet.2012.04.091
日期:2012.7
procedure for the palladium-catalysed Suzuki–Miyaura coupling of various alkenyltosylates with alkenyl MIDA boronates has been developed. Commercially available trans-bromo[N-succinimidyl-bis(triphenylphosphine)]palladium(II) [Pd(PPh3)2NBS] is an effective catalyst under the slow release conditions of MIDA boronates; with less activated alkenyltosylates addition of the cheap, air-stable tricyclohexylphosphine
Novel oxabicyclononane ether derivatives have the general formula:-
where each of R1 - R4 independently is hydrogen or a substituent and W is optionally substituted phenyl or a heterocyclic ring.
The compounds show selective herbicidal activity and may be used to control the growth of undesired vegetation in e.g. soybeans, cotton, sugar beet, rape, corn, wheat, barley and particularly in rice.