SYNTHESIS OF N-ALKYL(ACYL)-1,2,3,4-TETRAHYDRO-4-METHYLSPIRO AND THEIR CONVERSIONS

Article abstract of DOI:10.1007/BF00531546

The alkylation and acylation of 1,2,3,4-tetrahydro-4-methylspiro and its bromo(methyl) derivatives substituted in the benzene ring, as well as 1,2,3,4-tetrahydro-4-methylspiro, were studied.It was established that the N-allyl derivatives of spiro are converted to their 8-allyl-substituted analogs by the action of sulfuric acid, boron trifluoride etherate, and aluminum chloride.It was shown that the N-acyl-substituted spiro are recyclized to spiro in phosphoric acid.