À-Bond Screening in Benzonorbornadienes: The Role of 7-Substituents in Governing the Facial Selectivity for the Diels-Alder Reaction of Benzonorbornadienes with 3,6-Di(2-pyridyl)-s-Tetrazine

À-Bond Screening in Benzonorbornadienes: The Role of 7-Substituents in Governing the Facial Selectivity for the Diels-Alder Reaction of Benzonorbornadienes with 3,6-Di(2-pyridyl)-s-Tetrazine

Benzonorbornadiene 21, 7-spirocyclopropylbenzonorbornadiene 23, 7,7-dimethylbenzonorbornadiene 25, and 7-spirocyclopentylbenzonorbornadiene 27 have been reacted with 3,6-di(2-pyridyl)-s-tetrazine (rate: 21>23>25=27) to form symmetrical 4,5-dihydropyridazines which are stable towards fragmentat...

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Bibliographic Details
Main Authors: Peter A. Harrison, Ronald N. Warrener
Format: Article
Language:English
Published: MDPI AG 2001-03-01
Series:Molecules
Subjects:
3
6-di(2-pyridyl)-s-tetrazine
cycloaddition
steric effects
endo-addition
di(2- pyridyl)pyridazines
Online Access:http://www.mdpi.com/1420-3049/6/4/353/

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