| abstract |
A METHOD FOR THE PREPARATION OF 4,5,6,7,-TETRAHYDROINDAZOLES OF THE FORMULA: 1-R1,3-R2,R3,R4-4,5,6,7-TETRAHYDROINDAZOLE, OR 2-R1,3-R2, R3,R4-4,5,6,7-TETRAHYDROINDAZOLE IN WHICH AN INDAZOLE OF THE GENERAL FORMULA: 1-R1,3-R2,R3,R4-INDAZOLE OR 2-R1,3-R2,R3,R4-INDAZOLE IS HYDROGENATED IN THE PRESENCE OF PALLADIUM, RHODIUM OR PLATINUM OR CATALYSTS CONTAINING MIXTURES OF THEM AND IN THE PRESENCE OF A STRONG ACID IN A MOLAR EQUIVALENT AT LEAST EQUAL TO THAT OF THE BASIC GROUPS. |