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We calculate the effects of Pauli-blocking in the quasideuteron model of hard photon-absorption. Our approach is based upon phase space considerations and uses Fermi-gas state densities that conserve linear momentum.The Pauli-blocking function that we obtain differs from Levinger s phenomenological exponential factor and yields nuclear photoabsorption cross sections that are in good agreement with experimental data for photon energies up to the pion threshold, The temperature dependence of the nuclear photoabsorption cross section in the quasideuteron regime is also investigated. The model that we use to describe nuclear photoabsorption is particularly suited for application to preequilibrium models of hard photon emission.

Nitroethylene. -The title catalyst is successfully applied in asymmetric 1,4-addition of 3'-indolyl-3-oxidole to nitroethylene. The mixed 3,3'-bisindole products are obtained with high enantioselectivity. The non-protected and N-acyl substrates on the oxindole site do not react.The biologically important 3'-indolyl-3-pyrrolidinoindoline (IV) can be synthesized in three steps. -(AWATA, A.; WASAI, M.; MASU, H.; KADO, S.; ARAI*, T.; Chem. -Eur.

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