Iridium-Catalyzed Tandem Cyclization of Benzoylacetonitriles with Diazo Compounds Leading to Substituted Naphtho[1,8-<i>bc</i>
]pyrans by Sequential C−H Functionalization
作者:Kelu Yan、Bin Li、Baiquan Wang
DOI:10.1002/adsc.201800149
日期:2018.6.15
annulation reactions of benzoylacetonitriles with diazocompounds proceed efficiently in the presence of an iridium catalyst to give substitutednaphtho[1,8‐bc]pyrans by sequential cleavage of C(sp2)−H/C(sp3)−H and C(sp2)−H/O−H bonds. Interestingly, the reactions involving cyclic diazocompounds and open‐chain diazocompounds lead to different types of naphtho[1,8‐bc]pyrans. Most products are obtained
benzoylacetonitriles与重氮化合物级联环反应在铱催化剂的存在下有效地进行,得到取代的萘并[1,8- BC ]通过C(的顺序裂解吡喃SP 2)-H / C(SP 3)-H和C(SP 2)-H / OH键。有趣的是,涉及环状重氮化合物和开链重氮化合物的反应会导致不同类型的萘并[1,8- bc ]吡喃。大多数产品都是以中等到良好的收率获得的,并具有广泛的底物。
Complementary C–H Functionalization Mode of Benzoylacetonitriles: Computer-Augmented Study of a Regio- and Stereoselective Synthesis of Functionalized Benzofulvenes
作者:Xia Song、Bao Nguyen Do Doan、Xinying Zhang、Richmond Lee、Xuesen Fan
DOI:10.1021/acs.orglett.9b03858
日期:2020.1.3
A highly regio- and stereoselectivesynthesis of functionalized benzofulvenes via Rh(III)-catalyzed cascade reactions of benzoyl acetonitrile/methylsulfone/acetate with propargyl alcohols is presented herein. Mechanistic modeling performed with density functional theory (DFT) calculations suggested that the hydroxyl group and CsOAc played important roles in mediating the 5-membered ring cyclization
Rhodium(III)‐Catalyzed C−H activation of benzoylacetonitriles in coupling with sulfoxonium ylides was developed to synthesize diversified substituted naphthols, in which aryl, heterocyclic and alkyl groups in sulfoxonium ylides are tolerated. Intriguingly, we have further implemented transformation for 1‐naphthols to give some intriguing fused tricyclic compounds and derivatives of propranolol, which