Rh(I)-Catalyzed Reaction of 2-(Chloromethyl)phenylboronic Acids and Alkynes Leading to Indenes
摘要:
The reaction of 2-(chloromethyl)phenylboronic acid (1) with alkynes in the presence of a Rh(I) complex gave indene derivatives in high yields. The regioselectivity depends on the steric nature of the substituent on the alkynes. A bulky group favors the alpha-position of indenes.
ortho-Halomethylphenyllead triacetates (halo = bromine or chlorine) react with phenols in the presence of triethylamine and a pyridine derivative to afford modest to good yields of dibenzo[b,d]-6H-pyrans. (C) 2001 Elsevier Science Ltd. All rights reserved.