Synthesis of Tofogliflozin as an SGLT2 Inhibitor via Construction of Dihydroisobenzofuran by Intramolecular [4 + 2] Cycloaddition
作者:Masatoshi Murakata、Akira Kawase、Nobuaki Kimura、Takuma Ikeda、Masahiro Nagase、Masatoshi Koizumi、Kazuaki Kuwata、Kenji Maeda、Hitoshi Shimizu
DOI:10.1021/acs.oprd.8b00400
日期:2019.4.19
The synthesis of tofogliflozin (1), a sodium glucose cotransporter 2 (SGLT2) inhibitor, was achieved through the key steps of intramolecular [4 + 2] cycloaddition of dienone-yne intermediate, aerobic aromatization, and anomeric equilibration, thus enabling the construction of a dihydroisobenzofuran moiety of 1. Subsequent hydrogenolysis followed by global deprotection afforded the desired compound
甲苯磺酸钠共转运蛋白2(SGLT2)抑制剂tofogliflozin(1)的合成是通过以下步骤完成的:分子内[4 + 2]二烯酮-炔中间体的环加成,好氧芳构化和异头平衡,从而能够构建的二氢异苯并呋喃部分1。随后的氢解,然后整体脱保护,得到所需化合物1。还描述了1(15)的异构体的发散合成。