Subject: Pericyclic additions

From: "Yuan-Yuan chen" <[email-masked]>
Date: Wed, 01 Aug 2001 15:47:06 -0400

Hi, every one

There are two recent papers of contradictory opinions on the mechanism of 
Diels-Alder reactions if you are interested:

1. Tetrahedron Lett. 2001, 42, 5077. “Merging of 4+2 and 2+4 cycloadditon 
paths in the regiospecific dimerization of methacrolein. A case of concerted 
crypto-diradical cycloaddition”

2. http://preprint.chemweb.com/orgchem/0107002
	“Collision-induced electron reorganization as the general mechanism of 
concerted cycloaddition reactions”.

Yuan-Yuan

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