Council of Scientific and Industrial Research

Pravin Raybaji Likhar

Boyapati Manoranjan Choudary

Lakshmi Kantam Mannepalli

Khathija Aziz

Bhanuprakash Kotamarthi

Sreedhar Bojja

Sitha Sanyasi

Jeyalakshmi Kulandaivelu

Ananda Kumar Bandyopadhyay

The present invention comprises the simultaneous ring opening and concomitant N-substitution of various N-tosyl aziridines with different aliphatic and aromatic nitriles in presence of catalytic amount of metal triflates to afford different N-substituted &#x3b2;-amino nitriles in excellent yields and selectivities.

Process for the synthesis of N-Substituted &#x3b2;-amino nitriles through the ring opening of aziridines

The invention describes an improved process for the preparation of malononitrile by using a porous particulate solid substance as efficient absorbent. Cyanoacetamide is reacted with POCl,as a dehydrating agent in a suitable solvent in the presence of an organic N-donor base as catalyst and a porous particulate solid substance as efficient absorbent. The product is then distilled under vacuum from the crude in the presence of a stabilizer into a receiver containing the same stabilizer, to obtain malononitrile of high purity and shelf-life.

Process for the preparation of malononitrile

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Hyderabad Telangana, India

Pravin Raybaji Likhar