Decarboxylative Allylation of Glyoxylic Acids with Diallyl Carbonate
作者:Filipe Manjolinho、Matthias F. Grünberg、Nuria Rodríguez、Lukas J. Gooßen
DOI:10.1002/ejoc.201200766
日期:2012.9
ketones. The key advantage of the new reaction protocol is that preformation of the allyl esters is not required. The reaction is believed to proceed via phosphane-mediated decarboxylation of the α-oxocarboxylates, leading to acyl anionequivalents that are allylated within the coordination sphere of the palladium catalyst. Under the reaction conditions, the double bond then migrates into conjugation
that permits ring-closingmetathesis and bifunctional chiral amine (thio)urea-catalyzed Michael addition reactions to proceed in a one-pot fashion. The process offers an alternative approach to the synthesis of structurally diverse chiral cyclopentanes in good yields and good enantioselectivities. A relay strategy is described that permits ring-closingmetathesis and bifunctional chiral amine (thio)urea-catalyzed
Metal‐bound water molecules have recently been recognized as a new facet of soft Lewis acid catalysis. Herein, a chiral palladium aqua complex was constructed that enables carbon–hydrogen bonds of indoles to be functionalized efficiently. We embraced a chiral 2,2′‐bipyridine as both ligand and hydrogen‐bond donor to configure a robust, yet highly Lewis acidic, chiral aqua complex in water. Whereas the
A new organic transformation by introducing crotyl/allyltrifluoroborates in cross-coupling reaction with aroyl chlorides
作者:Mohammad Al-Masum、Kwei-Yu Liu
DOI:10.1016/j.tetlet.2011.07.107
日期:2011.9
Microwave irradiated PdCl2(dtbpf) catalyzed direct cross-coupling reaction of aroylchlorides with potassium crotyl/allyltrifluoroborates has been developed. Regioselectivity of the cross-coupling product is varied from crotyltrifluoroborate to allyltrifluoroborate.
已经开发了微波辐射的PdCl 2(d t bpf)催化的芳酰氯与巴豆基/烯丙基三氟硼酸钾的直接交叉偶联反应。交联产物的区域选择性从巴豆基三氟硼酸酯到烯丙基三氟硼酸酯变化。