Chromite catalysts s. under

Chromite catalysts s. under Copper Chrominm s. a. Chromyl... 

Clemo and Swan found that 2-methyl- and 2-ethyl-7-azaindole were reduced more reliably with copper chromite as catalyst under 160 atm of hydrogen at 180°. 2-Methyl-7-azaindoline (98, R = Me) was obtained in 42 % yield. They reported that Kruber s conditions gave mostly gums, from which only a little of the A-benzoyl derivatives could be isolated. Recently, however, 2-methyl-7-azaindoline (98, R = Me) was prepared on a 0.7-mole scale by use of Raney nickel under conditions identical to those used by Kruber, although no yield was reported. ... 

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