A number of methyl 2-substituted, 2,3-disubstituted-4H-furo[3,2-b]pyrrole-5-carboxylates (V - VII) and methyl 1H-benzo[b]furo[3,2-b]pyrrole-2-carboxylate (VIII) was prepared by the thermolysis of corresponding methyl 2-azido-3-(R1,R2-substituted-2-furyl)propenoates (I - IV). N-Methyl and N-benzyl derivatives IX - XVI were prepared at the phase-transfer catalysis conditions. Hydrolysis of some N-methyl and N-benzyl substituted esters furnished corresponding acids XVII - XXII. The hydrazides XXIII - XXX were obtained from corresponding esters and hydrazine hydrate. The preparation of 1-benzylbenzo[b]furo[3,2-b]pyrrole (XXXI) is described as well.
通过相应的甲基2-取代的、2,3-二取代-4H-呋喃[3,2-b]吡咯-5-羧酸酯(V - VII)和甲基1H-苯并[b]呋喃[3,2-b]吡咯-2-羧酸酯(VIII)的热解制备了一些产物。在相转移催化条件下制备了N-甲基和N-苄基衍生物IX - XVI。对一些N-甲基和N-苄基取代酯的水解得到了相应的酸XVII - XXII。通过相应的酯和联氨醇水合物得到了肼XXXIII - XXX。文中也描述了1-苄基苯并[b]呋喃[3,2-b]吡咯(XXXI)的制备方法。