Condensation of alkyl allyl (and 3-methyl-3-butenyl) phosphorochloridates with dialkyl phosphates gave trialkyl allyl (and 3-methyl-3-butenyl) pyrophosphates. Reactions of crotyl (2-butenyl) pyrophosphates with various nucleophiles such as phenolic ethers, aromatic amines, and nitrogen-containing heterocycles in the presence of boron trifluoride etherate gave good to moderate yields of crotylated products. The
Pd-porphyrin complex-catalyzed allylation of indole with allylic alcohols through C3–C2 coupling
作者:Alaa A. Atia、Masanari Kimura
DOI:10.1016/j.tet.2021.132213
日期:2021.6
for the preparation of 3-allyl-2,3-dihydro-2,3′-bisindoles has been developed via homocoupling of N-H indole. Pd-porphyrin-catalyzed allylation of indoles with allylic alcohols in the presence of PBr3 and a base is developed. The reaction involves dimerization at the C3 and C2 positions of the indoles, giving 2-allylated 3-(indolin-2-yl)-1H-indoles in moderate to good yields. 3-(Indolin-2-yl)-1H-indole
Ir-Catalyzed Regio- and Enantioselective Friedel–Crafts-Type Allylic Alkylation of Indoles
作者:Wen-Bo Liu、Hu He、Li-Xin Dai、Shu-Li You
DOI:10.1021/ol800409d
日期:2008.5.1
Highly regio- and enantioselective Ir-catalyzed Friedel-Crafts type allylic alkylation of indoles have been realized using [Ir(COD)Cl]2/phosphoramidite ligand 1a, affording the branched products with up to >97/3 branched-linear ratio and 92% ee.
Pyrrole and indoles react smoothly with alkyl halides such as allyl bromide, prenyl bromide, crotyl bromide and propargyl bromide in the presence of zinc metal in THF to afford the corresponding 3- and 2-alkyl pyrrole and 3-alkyl indole derivatives in good yields with high regioselectivity.
Process for the enantioselective preparation of secondary alcohols by lipase-catalyzed solvolysis of the corresponding acetoacetic esters
申请人:Popp Alfred
公开号:US20050032182A1
公开(公告)日:2005-02-10
Process for the enantioselective preparation of secondary alcohols, wherein a racemic or enantiomerically enriched mixture of acetoacetic esters of chiral secondary alcohols is subjected to enantioselective enzymatic solvolysis in the presence of a nucleophile and a lipase capable of the solvolytic cleavage of an ester group.