@article {3755,
	title = {Nucleophilic reaction of 1,8-diazabicyclo[5.4.0]undec-7-ene and 1,5-diazabicyclo-[4.3.0]non-5-ene with methyl pheophorbide a. Unexpected products},
	journal = {Tetrahedron},
	volume = {52},
	number = {3},
	year = {1996},
	note = {ISI Document Delivery No.: TL974Times Cited: 17Cited Reference Count: 19},
	month = {Jan},
	pages = {849-860},
	type = {Article},
	abstract = {Trialkylsilyl triflates promote the direct nucleophilic reaction of {\textquoteright}{\textquoteright}non-nucleophilic DBU and DBN{\textquoteright}{\textquoteright} with methyl pheophorbide a (1) to give substituted chlorin e(6) amides 3 and 4, where the bicyclic bases have undergone ring opening. The reaction most likely results from coordination of trialkylsilyl triflates to the beta-ketoester in 1, forming an ion-pair intermediate 6. The adduct 6 is so strongly electron-deficient that it can electrophilically attack the nonbonding nitrogen electron pairs in DBU and DBN.},
	keywords = {DERIVATIVES, SUBSTITUTION},
	isbn = {0040-4020},
	url = {<Go to ISI>://A1996TL97400013},
	author = {Ma, L. F. and Dolphin, D.}
}
