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爱笑的阿里: 金币+50, 翻译EPI+1, ★★★★★最佳答案, 多谢大侠，多谢 2014-12-23 16:16:07
Notably, such functional-group tolerance might also omit the use of protecting groups and streamline more-complex syntheses. Especially with respect to selectivity, the reduction of -NO2 in the presence of other reducible substituents, such as ketones, aldehydes, alkenes or alkynes, remains challenging.
值得注意的是，这种官能团的耐受性也可能不用（或省略）使用保护基团，并简化更复杂的合成。尤其就选择性（而言），在酮、醛、烯烃或炔烃等其它可被还原取代基存在的条件下还原-NO2仍然具有挑战性。 |
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