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Communication | Special issue | Vol 5, No. 1, 1976, pp.157-162
Published online, 1st January, 1970
DOI: 10.3987/S-1976-01-0157
A New Modification of Bischler-Napieralski Reaction for β-Arylethylisocynates and β-Arylethylurethans

Yoshisuke Tsuda,* Kimiaki Isobe, Jun Toda, and Jun’ichi Taga

*School of Pharmacy, Hokuriku University, 3-Ho, Kanagawa machi, Kanazawa 920-1181, Japan


Two-step treatment of β-arylethylisocyanates (1) and -urethans (2) with POCl3 followed by SnCl4 gave the corresponding dihydroisocarbostyrils (6) in satisfactory yields; the method was conveniently applicable to the hindered isocyanates and urethans with complex structure.