Mechanism of the Solution-Phase Reaction of Alkyl Sulfides with Atomic Hydrogen. Reduction via a 9-S-3 Radical Intermediate
作者:Dennis D. Tanner、Sudha Koppula、Pramod Kandanarachchi
DOI:10.1021/jo9615615
日期:1997.6.1
alkyl sulfide fragmentation subsequent to its reaction with atomichydrogen is indicative of a reaction that proceeds via an early transition state. The competitive reduction of a series of substituted-benzyl alkyl sulfides was insensitive to the substituent on the aromatic ring (rho = -0.13, r = 0.99). The relative rates of fragmentation of a series of the substituted-benzyl alkyl sulfides gave a
2,3-Dihydro-imidazo (2,1-b) benzothiazole derivatives and pharmaceutical compositions containing them
申请人:JANSSEN PHARMACEUTICA N.V.
公开号:EP0021806A1
公开(公告)日:1981-01-07
Compounds of formula
and the salts of formula
wherein:
R' and R3 are hydrogen and alkyl;
R2 and R4 are hydrogen, alkyl, aryl, aralkyl, alkyloxyl alkyl or aryloxyl alkyl;
R5, R6, R7 and R8 are hydrogen; halo; nitro; alkyl; cycloalkyl; hydroxy; alkyloxy; aryloxy; a-hydroxyaryl-methyl; amino; mono- and dialkyl-amino; mono-, di- and trihalo alkyl-amino; alkenylamino; alkynylamino; (aryl alkyl) amino; (alkyloxy alkyl)amino; (hydroxy alkyl)amino; (aryloxy alkyl)amino; (mono- and di(alkyl)amino-alkyl)amino; alkanoyl-amino; N-(alkyl)-alkanoylamino; aminocarbonylamino; (1-alkyl-4-piperidinyl)amino; cycloalkylamino wherein said cycloalkyl represents a mono-, bi-, tri- or tetracyclic hydrocarbon radical having from 3 to 10 carbon atoms; and a radical of the formula -N-CH=C(COO-alkyl)2 R10
wherein R'° is hydrogen, alkyl, alkenyl and alkynyl; or, when taken together R5and R6, R6and R8 or R7 and R8 may form a tri-or tetramethylene bridge or complete a fused benzene nucleus; R9 is alkyl, alkenyl, alkynyl and aryl alkyl; and X is a pharmaceutically acceptable anion and n represents the valency of the anion, display monoamine oxidase inhibiting properties.