Rhodium‐Catalyzed Divergent Arylation of Alkenylsulfonium Salts with Arylboroxines
作者:Yun Ye、Jie Zhu、Haijiao Xie、Yinhua Huang
DOI:10.1002/anie.202212522
日期:2022.12.5
A ligand-controlled rhodium-catalyzed divergent arylation of alkenyl thianthrenium salts with arylboroxines which allows switchable synthesis of both terminal and internal alkene products in a highly selective manner is reported. The use of a diene ligand guides the reaction toward cine-arylation affording terminal alkenes, while the use of a phosphine ligand switches the reaction to ipso-arylation
A convenient two-step procedure for the synthesis of primary (Z)-allyl amines, (Z)-homoallyl amines [(Z)-but-3-enylamines], and (Z)-pent-4-enylamines using the Wittig reaction was achieved. The use of nonstabilized ylides from triphenylphosphonium salt, potassium salt, and apolar solvent produced (Z/E)geometric isomer ratios generally greater than 1.6. The amine moiety was masked using a phtalimide group that was removed successfully in the last step of the process in two different conditions, NH2NH2/EtOH/rt or CH3NH2/EtOH/rt. However, in some cases, reduction of the C=C double bond in the deprotection with hydrazine was concomitantly observed.
Role of the through-space 2p-3d overlap effect in the Wittig reaction
作者:William E. McEven、John V. Cooney
DOI:10.1021/jo00155a010
日期:1983.4
MCEWEN, W. E.;COONEY, J. V., J. ORG. CHEM., 1983, 48, N 7, 983-987