Reaction of 132-oxopyropheophorbide a with CH2N2 produced three isomeric methoxyverdinochlorins via expansion of the cyclopentanedione ring E; these long-w...
Each of a series of C(5)H(6)O(2) isomeric carboxylic acid and unsaturated lactones (1-7) was protonated in both concentrated sulfuric acid and trifluoromethanesulfonic acid. The thermally induced transformations of the protonated species...
CO2Me NH N N HN O CO2Me NH N N HN O Me Me Me Me Me Et Me Me Me 1 2 5 10 15 20 131 132 133 Synthesis of verdinochlorins: a new class of long-wavelength abso...
Reaction of 132-oxopyropheophorbide a with CH2N2 produced three isomeric methoxyverdinochlorins via expansion of the cyclopentanedione ring E; these long-wavelength absorbing verdinochlorins represent the first example of verdins with a ...
Each of a series of C(5)H(6)O(2) isomeric carboxylic acid and unsaturated lactones (1-7) was protonated in both concentrated sulfuric acid and trifluoromet...
1448 J.C.S. Perkin I Synthesis of Calythrone and Related Cyclopentene-I ,3-diones via Rearrangement of 4-Y Iidenebutenol ides By Nicholas G. Clemo, David R. Gedge, and Gerald Pattenden," Department of Chemistry, The University, Nottingha...
1H and 13C NMR spectra of Ti(OiPr)4 complexes with 3-methyl-1,2-cyclopentanedione in deuterochloroform solution reveal formation of different compounds, de...
The reduction of the oxo functions in ethyl 5-(6-ethoxycarbonylhexyl)-3,3-dimethyl-2,4-dioxocyclopentanecarboxylate (1) with NaBH4, with LiAlH(O-t-Bu)3 and by catalytic hydrogenation is described. Four isomeric hydroxycyclopentanones and...
