Iron-Catalyzed Dioxygen-Driven C–C Bond Formation: Oxidative Dearomatization of 2-Naphthols with Construction of a Chiral Quaternary Stereocenter
摘要:
Iron(salan) complex 1 was found to catalyze the oxidative dearomatization of 1-substituted 2-naphthols with the formation of an all-carbon quaternary stereocenter in air in the presence of nitroalkanes, to afford the corresponding cyclic enones with high enantioselectivity of 88-96% ee.
Rh-Catalyzed Aminative Dearomatization of Naphthols with Hydroxylamine-<i>O</i>
-Sulfonic Acid (HOSA)
作者:Ji-Cheng Yi、Zhi-Jie Wu、Shu-Li You
DOI:10.1002/ejoc.201900917
日期:2019.9.8
A Rh‐catalyzed aminativedearomatization of naphthols with HOSA was achieved. A series of unprotected α‐amino‐β‐naphthalenones was afforded in good yields under mild conditions.
Direct Allylic C(sp3)-H Alkylation with 2-Naphthols via Cooperative Palladium and Copper Catalysis: Construction of Cyclohexadienones with Quaternary Carbon Centers
作者:Ming Jin、Wei Ren、Dang-Wei Qian、Shang-Dong Yang
DOI:10.1021/acs.orglett.8b02910
日期:2018.11.16
Pd(PPh3)4/Cu(MeCN)4PF6 cooperative catalysis under mild base-free conditions. Special tolerance was observed with peptides, allowing late-stage modifications of peptides. The transformation provides a general protocol to obtain functionalized cyclohexadienones with quaternary carbon centers under two alternative sets of conditions and serves as a complementary catalysis system for the dearomatization of
A palladium-catalyzed enantioselective Heck cyclization/dearomatization cascade via capturing the cyclized Heck π-allylpalladium intermediate by β-naphthols is reported, which provides a new strategy for the construction of chiral indole–terpenoid frameworks. This method affords indole-functionalized β-naphthalenone compounds bearing an all-carbon-substituted quaternary chiral center in excellent yields
Iron(II) Chloride-Catalyzed Nitrene Transfer Reaction for Dearomative Amination of β-Naphthols with Aryl Azides
作者:Dun-Qi Wu、Zhen-Yu Guan、Yi Peng、Jian Sun、Cheng Zhong、Qing-Hai Deng
DOI:10.1002/adsc.201800810
日期:2018.12.21
nitrogen‐containing quaternarycarboncenter catalyzed by cheap and readily available iron salt FeCl2, and affords a series of α‐amino‐β‐naphthalenones in good to excellent yields under simple and mild reaction conditions. Preliminary experimental and computational studies suggest that the reaction is probably initiated by iron‐iminyl diradical and followed by intramolecular hydrogen transfer to generate iron‐aminyl
Application of a CC Bond-Forming Conjugate Addition Reaction in Asymmetric Dearomatization of β-Naphthols
作者:Dongxu Yang、Linqing Wang、Ming Kai、Dan Li、Xiaojun Yao、Rui Wang
DOI:10.1002/anie.201503056
日期:2015.8.10
conjugate reaction was successfully applied to the enantioselectivedearomatization of β‐naphthols. A C(sp2)C(sp3) bond is formed by using propargylic ketones as reactive partners. Good to excellent Z/E ratios and ee values were obtained by employing an in situgeneratedmagnesiumcatalyst. Further transformations of the Z‐configured CC double bond in the products were achieved under mild reaction conditions
AC C键形成共轭反应成功地应用于β萘酚的对映选择性脱芳构化。AC(sp2)C(sp3)键是通过使用炔丙基酮作为反应伙伴而形成的。 通过使用原位生成的镁催化剂获得了良好的Z / E 比和ee值。在温和的反应条件下,产物中Z构型的CC双键进一步转化。此外,通过计算化学探索了这种镁催化的脱芳香化反应的立体控制元素。