APPROXIMATE RATE CONSTANTS FOR 5-EXO AND 6-EXO CYCLIZATIONS OF ALKYL RADICALS TO N-AZIRIDINYL IMINES

Authors
KIM S CHEONG JH YOON KS
Citation
S. Kim et al., APPROXIMATE RATE CONSTANTS FOR 5-EXO AND 6-EXO CYCLIZATIONS OF ALKYL RADICALS TO N-AZIRIDINYL IMINES, Tetrahedron letters, 36(34), 1995, pp. 6069-6072
Citations number
18
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron letters → ACNP
ISSN journal
00404039
Volume
36
Issue
34
Year of publication
1995
Pages
6069 - 6072
Database
ISI
SICI code
0040-4039(1995)36:34<6069:ARCF5A>2.0.ZU;2-F
Abstract
Kinetic and competition studies establish that the rate constant for 6 -exo cyclizations of alkyl radicals to N-aziridinyl imines is approxim ately 4.7x10(6) s(-1) at 80 degrees C, whereas competition studies ind icate that the rate constant for the corresponding 5-exo cyclization w ould be over 2.5x10(8) s(-1) at 20 degrees C.