作者:Sun-Hwa Lee、Dmitry V. Gutsulyak、Georgii I. Nikonov
DOI:10.1021/om400269q
日期:2013.8.26
4-dihydropyridine reacts with ketones and aldehydes to give products of N–Si addition across the C═O bond. Hydrosilylation of pyridine in acetone results quantitatively in the addition product PhMe2SiO–CMe2–NC5H6, which decomposes in hexane to give the parent dihydropyridine HNC5H6. The phenanthroline complex [Cp(phen)Ru(NCCH3)2]+ (10) catalyzes regioselective 1,4-reduction of phenanthroline by a 3–4-fold excess
钌络合物[Cp(i Pr 3 P)Ru(NCCH 3)2 ] +(1)催化吡啶向1,4-二氢吡啶的区域选择性氢化硅烷化。在3-和5-位的取代是可容忍的,而在2-,4-和6-位带有取代基的吡啶不被还原。具有酮和酯取代基的官能化吡啶的还原产生产物的混合物。N -Silyl-1,4-二氢吡啶与酮和醛反应,生成跨C═O键的N-Si加成产物。吡啶在丙酮中的氢化硅烷化定量生成了加成产物PhMe 2 SiO–CMe 2 –NC 5H 6,在己烷中分解,得到母体二氢吡啶HNC 5 H 6。菲咯啉络合物[Cp(phen)Ru(NCCH 3)2 ] +(10)通过3–4倍过量的硅烷/水或硅烷/醇混合物催化菲咯啉的区域选择性1,4-还原。Cp *类似物[Cp *(phen)Ru(NCCH 3)2 ] +(9)催化菲咯啉,喹啉,a啶和1,3,5-三嗪的1,4-区域选择性单氢硅烷化和异喹啉的1,2-还原。相反,在这