4-hydroxy-4,5,6,7-tetrahydro-thieno[2,3-c]pyridine-5-carboxylic acid 、
sodium nitrite 在
水 作用下,
以
盐酸 为溶剂,
反应 3.0h,
以to give beige crystals (paste melting from 100° C.) in a yield of 21.3 g (93%)的产率得到5-Carboxy-4-hydroxy-6-nitroso-4,5,6,7-tetrahydro-thieno[2,3-c]pyridine