ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

Published monthly
 

Abnormal occurrence of the Bischler-Napieralski reaction

L. Dúbravková, I. Ježo, P. Šefčovič, and Z. Votický

Slovak Academy of Sciences, Bratislava

 

Abstract: It has been proven that the cyclodehydration of Et α-(3,4,5-trimethoxybenzamido)-β-(3,4-methylenedioxyphenyl)propionate (I) with P2O5 does not occur and with PCl5, 4-piperonylidene-2-(3,4,5-trimethoxyphenyl)oxazolone, m. 198-200° (AcOH), is formed. With POCl3 on I in boiling toluene is formed some 1 - (3,4,5 - trimethoxyphenyl) - 3 - carbethoxy - 6,7 - methylenedioxy-3,4-dihydroisoquinoline, m. 113-14° (EtOH) [picrate, m. 193-4° (EtOH)], and as a main product 5-ethoxy-4-piperonyl-2-(3,4,5-trimethoxyphenyl)oxazole, m. 98-9° (dil. EtOH).

Full paper in Portable Document Format: 119a536.pdf (in Slovak)

 

Chemical Papers 11 (9) 536–541 (1957)

Saturday, May 25, 2024

IMPACT FACTOR 2021
2.146
SCImago Journal Rank 2021
0.365
SEARCH
Advanced
VOLUMES
European Symposium on Analytical Spectrometry ESAS 2022
© 2024 Chemical Papers