The synthesis of (+)- and (−)-1-benzoyl-1,2,2a,3,4,5-hexahydrobenz[cd]indol-4-amine, and preparation of LY228729.

Racemic epoxide5 was reacted with S-Phenylethylamine to afford diastereomers6 and7, from which amino alcohol6 could be isolated directly. Aziridine formation and tandem-hydrogenolysis provided optically pure primary amine2 (31% from racemic4), which was further elaborated to LY228729 (15), an interesting 5HT_1a receptor agonist.     

Study of structural and electronic transport properties of Ce-doped LaMnO3

The structural and electronic transport properties of La_1−x Ce _x MnO₃ (x=0.0–1.0) have been studied. All the samples exhibit orthorhombic crystal symmetry and the unit cell volume decreases with Ce doping. They also make a metal-insulator transition (MIT) and transition temperature increases with increase in Ce concentration up to 50% doping. The system La_0.5Ce_0.5MnO₃ also exhibits MIT instead of charge-ordered state as observed in the hole doped systems of the same composition.     

Two connected inverse spectral transforms

We establish a transformation which connects the potentials of the one-dimensional Dirac and Klein-Gordon operators. This transformation links the solutions of the nonlinear evolution equations solvable by means of the two inverse spectral transforms which use the Dirac and Klein-Gordon direct and inverse spectral problems.