Dhareshwar, G. P.; Chhaya, P. N.; Hosangadi, B. D., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1980, vol. 19, # 10, p. 831 - 835
Gas phase generation and cyclisation reactions of some o-substituted phenyl radicals
作者:J.I.G. Cadogan、H.Susan Hutchison、Hamish McNab
DOI:10.1016/s0040-4020(01)90385-0
日期:1992.9
Flashvacuumpyrolysis of the allyl esters 2 (XO,S, CH2, CO) at 900°C (10−2 Torr) gives dibenzofurans, dibenzothiophenes, fluorenes, and fluorenones respectively as the major products. The mechanism involves the phenyl radical intermediates 1 which equilibrate by intramolecular hydrogen transfer via six-membered transition states, prior to cyclisation.
The object of the present invention is to provide a photobase generator capable of efficiently generating amines (tertiary amines and amidine) high in catalytic activity by sensing light with a wavelength of from 350 to 500 nm (especially, from 400 to 500 nm).
The present invention is a photobase generator characterized in being represented by general formula (1) or (2).
Y+ is a quaternary ammonio group of general formula (3) to (5), and X− is a counter anion selected from among a borate anion, a phenolate anion, and a carboxylate anion.
The synthesis of a series of N‐(2‐chloroethyl)‐N′‐(9H‐xanthen‐9‐yl)‐N‐nitrosoureas and N‐(2‐chloroethyl)‐N′‐(9H‐thioxanthen‐9‐yl)‐N‐nitrosoureas is described. The title compounds were evaluated against NSCLCN6 L16 bronchial epidermoid carcinoma in vitro and some of them were found to be active. N‐(2‐chloroethyl)‐N′‐(2‐methoxy‐9H‐xanthen‐9‐yl)‐N‐nitrosourea (8e) was active against leukemia P388 tumor
The invention relates to compounds of Formula I, wherein R
1
, R
2
, and R
3
are defined in the specification, useful for the synthesis of novel conjugates and immunogens derived from quetiapine. The invention also relates to conjugates of a quetiapine hapten and a protein.
The object of the present invention is to provide a photobase generator capable of efficiently generating amines (tertiary amines and amidine) high in catalytic activity by sensing light with a wavelength of from 350 to 500 nm (especially, from 400 to 500 nm).
The present invention is a photobase generator characterized in being represented by general formula (1) or (2).
Y
+
is a quaternary ammonio group of general formula (3) to (5), and X
−
is a counter anion selected from among a borate anion, a phenolate anion, and a carboxylate anion.