P. T. Perumal

6′-Amino-3′-methyl-2-oxo-1′-phenyl-1′,3a′,4′,7a′-tetrahydrospiro[1H-indole-3(2H),4′-pyrano[2,3-d]pyrazole]-5′-carbonitrile (2008)

S. Etti, G. Shanthi, G. Shanmugam, P. T. Perumal

In the crystal structure of the title compound, C21H15N5O2, the planar indolone unit and the pyran ring are almost perpendicular to each other [dihedral angle = 89.41 (2)°], and the...

3-[3-(4-Bromophenyl)-1-phenyl-1H-pyrazol-4-yl]-5-ethoxy-2-phenylisoxazolidine (2008)

S. Etti, K. Karthikeyan, G. Shanmugam, P. T. Perumal

In the title compound, C26H24BrN3O2, the isoxazolidine ring adopts an envelope conformation, the ring N atom deviating from the mean plane of the other four atoms by an angle of 0.286°. The...

4′-Amino-2,2′′-dioxo-2,2′′,3,3′′-tetrahydro-1H-indole-3-spiro-1′-cyclopent-3′-ene-2′-spiro-3′′-1H-indole-3′,5′,5′-tricarbonitrile dihydrate (2008)

D. Gayathri, D. Velmurugan, G. Shanthi, P. T. Perumal, K. Ravikumar

In the title compound, C22H12N6O2·2H2O, the cyclopentene ring adopts an envelope conformation, with the spiro C atom bonded to the dicyano-substituted C atom deviating by...

6′-Amino-3′-methyl-2-oxo-1′-phenyl-1′,3a′,4′,7a′-tetrahydrospiro[1H-indole-3(2H),4′-pyrano[2,3-d]pyrazole]-5′-carbonitrile. Corrigendum (2008)

S. Etti, G. Shanthi, G. Shanmugam, P. T. Perumal

The title and chemical structural diagram in Etti, Shanmugam & Perumal [Acta Cryst. (2008), E64, o341] are corrected.

An Efficient Preparation of 1,2-Diamino-1-phenylheptane (2002)

S. Thennarasu, P. T. Perumal

A convenient four-step method for the preparation of the lipophilic vicinal diamine 1,2-diamino-1-phenylheptane is described. Condensation involving octan-2-one, benzaldehyde and ammonia is reported....