作者:Kai Cao、Scott B. Tran、Brad D. Maxwell、Samuel J. Bonacorsi
DOI:10.1002/jlcr.2937
日期:2012.6.30
of [2-14C]2, 5-dichloropyrimidine was based on condensation of [14C]urea with an acetal, followed by bromination, chlorination, boronic acid formation, and finally chlorination. This improved synthesis also started from readily available [14C]urea, which was condensed with 2-chloromalonaldehyde, followed by chlorination with POCl3 yielding [2-14C]2, 5-dichloropyrimidine with a radiochemical purity of
之前描述的 [2-14C]2, 5-二氯嘧啶的五步合成基于 [14C] 脲与缩醛的缩合,然后是溴化、氯化、硼酸形成,最后是氯化。这种改进的合成也从容易获得的 [14C] 尿素开始,它与 2-氯丙二醛缩合,然后用 POCl3 氯化得到 [2-14C]2, 5-二氯嘧啶,放射化学纯度为 99%,总放射化学产率为72%。版权所有 © 2012 John Wiley & Sons, Ltd.