Activation of sp<sup>3</sup> C−H Bonds with Cobalt(I): Catalytic Synthesis of Enamines
作者:Andrew D. Bolig、Maurice Brookhart
DOI:10.1021/ja075694r
日期:2007.11.28
of the metal alkyl products of oxidative addition has not been fully explored. Toward these ends, we have developed catalytic dehydrogenation of alkyl amines with a Co(I) catalyst. Amine substrates are protected with vinyl silanes, followed by catalytic transfer hydrogenation, to yield a broad range of stable protected enamines and 1,2-diheteroatom-substituted alkenes, including several unprecedented
CH 键的活化已用 (Cp*)M(L)n (M = Ir, Rh) 进行了广泛的研究,但钴,这个三元组的第三个成员,以前没有被证明可以激活 sp3 CH 键。此外,氧化加成的金属烷基产物的实用功能化尚未得到充分探索。为此,我们开发了使用 Co(I) 催化剂对烷基胺进行催化脱氢。胺底物用乙烯基硅烷保护,然后进行催化转移氢化,以产生各种稳定的受保护烯胺和 1,2-二杂原子取代的烯烃,包括几种前所未有的杂环。(Cp*)Co(VTMS)2 在令人惊讶的温和条件下以高化学选择性、区域选择性和非对映选择性催化转移氢化,同时耐受额外的功能。