No abstract

The efficient conversion of boronic acids, both arylboronic acids and alkylboronic acids, to the corresponding amines in water was accomplished in moderate to good yields using Cu(NO 3 ) 2 complexes of amines as the nitrogen source. The coupling reactions were performed in water at 30 °C for 2 hours.

Azapropellanes have been extensively studied for their special application. Debenzylation of pentabenzylpentaaza[3,3,3]propellane was studied in this paper. The N-benzyl groups were removed by catalytic hydrogen transfer under the mild conditions with simple process. The yield of the debenzylation product was lower. Their structures of all compounds were confirmed by spectra.

Oxazine derivatives R 0595 Synthesis of 2H-3,1-Pyrazolo[3,4-e]oxazines via a New Conversion ofFriedlaender Reaction. -The title compounds are obtained in modest yield by reaction of 5-amino-4-cyanopyrazole (I) with cycloketones in the presence of ZnCl2. With AlCl3, tacrine analogues (IV) are formed. -(LI*, J. R.; ZHANG, L. J.; CHEN, J. N.; YANG, X. Q.; WANG, L. J.; ZHAO, X. F.; QIU, J. X.; Chin.

New Conversion of Friedlaender Reaction of 3-Amino-1H-benzo[f]chromene--2-carbonitriles with Cyclohexanone. -Two different skeletons of heterocyclic compounds are formed: quinolines (III) are obtained by ordinary Friedlaender condensation together with the unexpected spiroheterocycles (IV). -(LI*, J. R.; ZHANG, L. J.; YANG, X. Q.; LI, Q.; WANG, D.; WANG, C. X.; SHI, D. X.; ZHANG, Q.; Chin.