Cyclodehydration of 4-[(Carboxymethyl)amino]pyridin-2-ones. A New, Efficient Synthesis of Pyrrolo[3,2-c]pyridin-4-ones and Pyrido[3,4-b]pyrrolizidin-1-ones
作者:Eric D. Edstrom、Tao Yu
DOI:10.1016/0040-4039(94)88205-3
日期:1994.9
efficient new route for the synthesis of pyrrolo[3,2-c]pyridin-2-ones and pyrido[3,4-b]pyrrolizidin-1-ones starting from 4-chloro-N-benzyl-2(1H)-pyridinone and amino acid salts. Intermediate 4-[(carboxymethyl)amino]pyridin-2-ones undergo an acylative cyclodehydration reaction to afford 3-acetoxy pyrroles. These intermediates are then converted into 3-oxytriflate derivatives in high yield using a new one-step
本文介绍了吡咯并合成一个有效的新路线并[3,2- c ^ ]吡啶-2-酮和吡啶并[3,4- b ] pyrrolizidin -1-酮由4-氯起始ñ -苄基-2-( 1 H)-吡啶酮和氨基酸盐。中间体4-[(羧甲基)氨基]吡啶-2-酮进行酰基环脱水反应,得到3-乙酰氧基吡咯。然后使用一种新的一步法将这些中间体高产率地转化为3-氧三氟甲磺酸酯衍生物。这些化合物经历钯催化的甲氧羰基化。