The cooperative effect of Lewis pairs in the Friedel–Crafts hydroxyalkylation reaction: a simple and effective route for the synthesis of (±)-carbinoxamine
An efficient C–C bond formation strategy between aromatic/heteroaromatic π-nucleophiles and Lewis acid activated aldehydes is described. This aromatic electrophilic substitution reaction of arenes or heteroarenes is facilitated by Lewis acid AlBr3. Aromatic rings with electron donating substituents are excellent nucleophilic counterparts in this reaction, generating carbinols in excellent yields (61–94%)
Synthetic approach towards trisubstituted methanes and a chiral tertiary α-hydroxyaldehyde, a possible intermediate for tetrasubstituted methanes
作者:Priyanka Singh、Subal Kumar Dinda、Shagufta、Gautam Panda
DOI:10.1039/c3ra41826j
日期:——
spacer between the central methano-carbon and benzene ring, is reported. In an approach towards asymmetric tetrasubstituted methane with high enantioselectivity, chiral tertiary α-hydroxyaldehyde has been synthesized through a Sharpless dihydroxylation on a disubstituted olefin, followed by the chemoselective oxidation of the primary alcohol.
Ni(<scp>ii</scp>) source as a pre-catalyst for the cross-coupling of benzylic pivalates with arylboronic acids: facile access to tri- and diarylmethanes
作者:Qiang Chen、Xin-Heng Fan、Li-Peng Zhang、Lian-Ming Yang
DOI:10.1039/c4ra16452k
日期:——
Various di- and triarylmethanes were synthesized via NiII–(σ-aryl) complex-catalyzed Suzuki–Miyaura cross-coupling of benzylic pivalates with arylboronic acids under mild conditions.
The Effect of Co‐catalyst in the Friedel–Crafts Reaction in Synthesis of Diaryl‐naphth‐1‐yl‐methane Derivatives
作者:S. Ray、Neeta Srivastava、Sangita、Atul Kumar
DOI:10.1081/scc-120039487
日期:2004.1.1
Abstract Synthesis of substituted diaryl‐naphth‐1‐yl‐methane has been carried out by Friedel–Craftsreaction of aryl naphth‐1‐yl methanol with substituted phenols. During the course of this reaction using AlCl3 as catalyst some rearrangements occurred, resulting in the formation of a complex mixture of products. Use of CTMS, ZrCl4, and SnCl4 as a co‐catalyst in combination with AlCl3 enhanced the formation