Intramolecular Cyclization Reactions of N-Alkylaryl-and N, N-Dialkylarylureas with Aldehydes

References

• Speckamp , W. N. and Himestra , H. 1985 . Tetrahedron , 41 : 4367
   Web of Science ®Google Scholar
• Venkov , A. and Lukanov , L. 1992 . Synth. Commun. , 22 : 3225
   Google Scholar
• Venkov , A. , Temnyalova , T. and Ivanov , I . 1995 . Synth. Commun. , 25 : 1419
   Web of Science ®Google Scholar
• Ben-Ishai , D. , Sataty , I. , Peled , N. and Goldshare . 1987 . Tetrahedron , 43 : 439
   Web of Science ®Google Scholar
• Lee , Y. , Kim , C. and Park , H. 1994 . Heterocycles , 38 : 2605
   Google Scholar
• Hoeve , W. and Wynberg , H. 1994 . Synth. Commun. , 24 : 2215
   Web of Science ®Google Scholar
• Takayama , M. , Nakao , M and Yamamoto , H. Japanese Patent 7334180 . 1973 . Sumitomo Chem. Co.
   Google Scholar
• 1973 . Chem. Abstr. , 79 : 31925
   Google Scholar
• Smolanoff , J. R. US Patent 4419360 . 1984 . Rohm & Hass Co.
   Google Scholar
• 1984 . Chem. Abstr. , 100 : 68190
   Google Scholar
• N-phenyl-N′-hydroxymethylene-tetrahydro-1,3,5-oxadiazin-4-one (8, R=C6H5, R1=CH2OH); mp 115–116°C; 1H-NMR(CDCl3):4.70(s,2H), 4.88(d,2H,J=4),5.10(s,2H),6.88(s,1H,br),7.20(s,5H); IR (CHCl3): v CO 1676 cm−1, v OH 3445 cm−1; MS: 208 (208.3, C10H12N2O3)
   Google Scholar
• Beachem , M. T. , Oppelt , J. C. , Cowen , F. M. , Schickedantz , P. D. and Maier , D. V. 1963 . J. Org. Chem. , 28 : 1876
   Google Scholar