Syntheses of<sup>3</sup>H-labeled,<sup>14</sup>C-labeled, and<sup>2</sup>H<sub>4</sub>-labeled SCH 444877, phosphodiesterase type 5 inhibitors
作者:Sumei Ren、David Hesk、Paul McNamara、David Koharski、Sharon Hendershot
DOI:10.1002/jlcr.3080
日期:2013.7
The syntheses of [3H]SCH 444877, [2H4]SCH 444877, and [14C]SCH 444877 are described. [3H]SCH 444877 was prepared in three steps from tritium gas. [2H4]SCH 444877 was synthesized from [2H4]ethanolamine in four steps with an overall yield of 40%. [14C]SCH 444877 was prepared from barium [14C]cyanamide in 10 steps with an overall yield of 8.1%.Copyright © 2013 John Wiley & Sons, Ltd.
本文介绍了[3H]SCH 444877、[2H4]SCH 444877 和[14C]SCH 444877 的合成。[3H]SCH 444877 由氚气分三步制备而成。以[2H4]乙醇胺为原料,分四个步骤合成了[2H4]SCH 444877,总收率为 40%。[14C]SCH44877由钡[14C]氰酰胺经10个步骤制备而成,总产率为8.1%。