α-Regioselective Barbier Reaction of Carbonyl Compounds and Allyl Halides Mediated by Praseodymium
作者:San Wu、Ying Li、Songlin Zhang
DOI:10.1021/acs.joc.6b01466
日期:2016.9.2
first utility of praseodymium as a mediating metal in the Barbier reaction of carbonylcompounds with allyl halides was reported in this paper. In contrast to the traditional metal-mediated or catalyzed Barbier reactions, exclusive α-adducts were obtained in this one-pot reaction with a broad scope of substrates and feasible reaction conditions.
?-Cleavage of Bis(homoallylic) Potassium Alkoxides. Two-Step Preparation of Propenyl Ketones from Carboxylic Esters. Synthesis ofar-Turmerone, ?-Damascone, ?-Damascone, and ?-Damascenone
作者:Roger L. Snowden、Simon M. Linder、Bernard L. Muller、Karl H. Schulte-Elte
DOI:10.1002/hlca.19870700721
日期:1987.11.4
The transformation of 36 bis(homoallylic) alcohols VII to alkenones IX and Xvia β-cleavage of their potassiumalkoxides VIIa in HMPA has been investigated (cf. Scheme 2). These studies have established an order of β-cleavage for 2-propenyl, 1-methyl-2propenyl, 2-methyl-2-propenyl, 1,1-dimethyl-2propenyl, and benzyl groups in alkoxides 49a–56a and have allowed a comparison between the β-cleavege reaction
Titanium-promoted allyl transfer to carbon monoxide and other unsaturated molecules
作者:Bert Klei、Jan H. Teuben、Henk J. Liefde de Meijer
DOI:10.1039/c39810000342
日期:——
Carbonylation of Cp2Ti-(π-allyl) yields Cp2Ti(CO)2 and triallylmethanol; reactions of Cp2Ti-(π-allyl) and Cp2Ti-(π-1-methylallyl) with other ligands proceed via insertion or allyl-elimination pathways.
Nickel catalyzes the multicomponent coupling reaction of terminal alkenes, carbon dioxide, and organoaluminum reagents, leading to the synthesis of homoallylic alcohols in moderate-to-good yields with excellent regio- and stereoselectivities.
Synthesis of compounds of the triallylmethane series based on reactions of triallylborane and derivatives of carbonic acid
作者:Yu. N. Bubnov、A. Yu. Zykov、I. V. Zhun、A. V. Ignatenko
DOI:10.1007/bf01431125
日期:1996.11
An original method was developed for the synthesis of functional derivatives of triallylmethane (CH2=CH-CH2)3C-X (X = OH, NH2, or SCOPh) based on reactions of triallylborane with the corresponding derivatives of carbonicacid (ethylene carbonate, diethylcyanamide, and 0,S-dimethyidithio carbonate) at 110–120 °C.