Process of preparing proline derivatives

Details Process of preparing proline derivatives Process of preparing proline derivatives

1987-11-19

1989-07-18

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544 63, 544 71, 544 72, 548408, 548452, 548492, 548532, 548535, C07D20716, C07D20918, C07D20954

Patent

active

048495247

ABSTRACT:
The invention relates to a process for preparing compounds of the formula I ##STR1## in which R stands for hydrogen, alkyl or aralkyl and R.sup.1 to R.sup.5 are identical or different radicals, (substituted) alkyl, cycloalkyl or (substituted) aryl or in which the pairs of radicals R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, and R.sup.4 and R.sup.5 together with the carbon atom(s) supporting them form a mono- or bicyclic ring system and the other radicals are hydrogen, by treating a compound of the formula II ##STR2## in which R and R.sup.1 and R.sup.5 have the abovementioned meaning and R.sup.6 and R.sup.7 denote alkyl or aralkyl or together with the nitrogen atom supporting them form a heterocycle which can additionally contain an oxygen atom, with a reducing agent.

REFERENCES:
patent: 4691022 (1987-10-01), Henning et al.

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