Synthesis of Dialkyl 2-(Alkylamino)-4,9-dihydro-9-oxocyclohepta[b]pyran-3,4-dicarboxylates
作者:Javad Azizian、Ali Ramazani、Mohammad Haji
DOI:10.1002/hlca.201000222
日期:2011.3
Dialkyl 2‐(alkylamino)‐4,9‐dihydro‐9‐oxocyclohepta[b]pyran‐3,4‐dicarboxylates are prepared in a one‐pot three‐component reaction of alkyl isocyanide, dialkyl acetylenedicarboxylate, and α‐tropolone (=2‐hydroxycyclohepta‐2,4,6‐trienone). The reaction proceeds smoothly at room temperature and under neutral conditions to afford tropolone derivatives in high yield.
二烷基2-(烷基氨基)-4,9-二氢-9-氧代环庚基[ b ]吡喃-3,4-二羧酸酯是通过烷基异氰化物,二烷基乙酰二羧酸二烷基酯和α- Tropolone(= 2-羟基环庚-2,4,6-三烯酮)。反应在室温和中性条件下平稳进行,以高收率得到托酚酮衍生物。