2-氨基-4,5-二氢-3-呋喃甲酰胺在乙酸存在下于吡啶中或在乙酸铵的影响下与吗啉反应生成相应的3-二氨基亚甲基-4,5-二氢-2(3 H )-呋喃酮; 没有分离出4,5-二氢-2-吗啉代-3-呋喃甲酰胺。前者之一与苄基胺反应生成( E )-和( Z )-3-(氨基-(苄基氨基)-亚甲基)-4,5-二氢-4-苯基-2(3 H )-呋喃酮和2-苄氨基-4,5-二氢-4-苯基-3-呋喃甲酰胺。
2-Amino-4,5-dihydro-3-methanesulfonylfurans 7 and 2-amino-4,5-dihydro-3-methanesulfonylthiophenes 8 were prepared by deamidation of tetrahydro-2-imino-3-methanesulfonyl-3-furancarboxamides 3 and of tetrahydro-2-imino-3-methanesulfonyl-3-thiophenecarboxamides 4 with bases. Compounds 3 and 4 were obtained by reaction of 2-amino-4,5-dihydro-3-furancarboxamides 1 and 2-amino-4,5-dihydro-3-thio-phenecarboxamides