135328-58-4

Upstream product

• 92044-52-5 1-(benzyloxy)-4-chloro-2-nitrobenzene 
• 1826-67-1 vinyl magnesium bromide 

Relevant academic research and scientific papers

Certain indole derivatives useful as leukotriene antagonists

A compound of the formula STR1 in which R1 is hydrogen, halo, C1-4 alkyl, C1-4 alkoxy, nitrile, optionally protected carboxy, optionally protected tetrazolyl, trihalomethyl, hydroxy-C1-4 alkyl, aldehydo, --CH2 Z, --CH=CH--Z or --CH2 CH2 Z where Z is optionally protected carboxy or optionally protected tetrazolyl; R2 is halo, nitrile, an optionally protected acid group or --CONR7 R8 where R7 and R8 are each hydrogen or C1-4 alkyl; R3 and R4 are each hydrogen, C1-4 alkyl, optionally substituted phenyl, or C1-4 alkyl substituted by --CONR7 R8 or an optionally protected acid group; R5 is STR2 where W is --CH=CH--, --CH=N--, --N=CH--, --O-- or --S--, R9 is hydrogen, halo, C1-4 alkyl, C1-4 alkoxy or trihalomethyl, and R10 is hydrogen, C1-4 alkyl, C2-6 alkenyl, C3-6 cycloalkyl or C1-4 alkyl-C3-6 cycloalkyl; R6 is hydrogen or C1-4 alkyl; X is --O--(CH2)n CR11 R12, --CR11 R12 --, --CR11 R12.(CH2)n.CR13 R14 -- or --CR11 =CR12 -- where R11, R12, R13 and R14 are each hydrogen or C1-4 alkyl, and n is 0, 1 or 2; and Y is --O--CR15 R16 --, --CR15 =CR16 -- or --CR15 R16.CR17 R18 -- where R15, R16, R17 and R18 are each hydrogen or C 1-4 alkyl; or a salt thereof. The compounds in unprotected form are active as leukotriene antagonists.

N-Benzyl-Indoles, processes for their preparation and pharmaceutical compositions containing them

A compound of the formula in which R1 is hydrogen, halo, C??? alkyl, C??? alkoxy, nitrile, optionally protected carboxy, optionally protected tetrazolyl, trihalomethyl, hydroxy-C??? alkyl, aldehydo,-CH?Z,-CH=CH-Z or-CH?CH?Z where Z is optionally protected carboxy or optionally protected tetrazolyl; R2 is halo, nitrile, an optionally protected acid group or-CONR?R? where R? and R? are each hydrogen or C??? alkyl, R3 and R? are each hydrogen, C??? alkyl, optionally substituted phenyl, or C??? alkyl substituted by-CONR?R? or an optionally protected acid group; R? is where W is-CH=CH-,-CH=N-,-N=CH-,-O-or-S-, R? is hydrogen, halo, C??? alkyl, C? ?? alkoxy or trihalomethyl, and R1? is hydrogen, C? ?? alkyl, C??? alkenyl, C??? cycloalkyl or C??? alkyl-C??? cycloalkyl; R? is hydrogen or C??? alkyl; X is-O-(CH?)nCR11CR12-,-CR11R12-,-CR11R12.(CH?) n.CR13R1?-or-CR11=CR12-where R11, R12, R13 and R1? are each hydrogen or C??? alkyl, and n is 0, 1 or 2; and Y is-O-CR1?R1?-,-CR1?=CR1?-or-CR1? R1?.CR1?R1?-where R1?, R1?, R1? and R1? are each hydrogen or C??? alkyl; or a salt thereof. The compounds in unprotected form are active as leukotriene antagonists.

The synthesis of 7-alkoxyindoles

A number of protected 7-hydroxyindoles was prepared by reaction of the protected 2-nitrophenols with vinylmagnesium bromide. Benzhydryl was shown to be the protecting group of choice, giving good yields of the indole and being readily removed for subsequent transformations of the 7-hydroxy function.