reductive cyclization of easily accessible benz-tethered 1,3-dienes containing a ketone moiety. This process provided biologically active 1,2-dihydronaphthalene-1-ol derivatives in good yields with excellent enantio- and diastereoselectivity. Mechanistic investigations using density functional theory revealed that (Z)- and (E)-allylcopper intermediates formed in situ from the diene and copper catalyst
Practical synthesis and applications of benzoboroxoles
作者:Dinara S. Gunasekera、Dennis J. Gerold、Nathan S. Aalderks、J. Subash Chandra、Christiana A. Maanu、Paul Kiprof、Viktor V. Zhdankin、M. Venkat Ram Reddy
DOI:10.1016/j.tet.2007.06.099
日期:2007.9
A convenient one-pot synthesis of benzoboroxoles has been developed via the reaction of o-bromobenzyl alcohols with NaH, (BuLi)-Bu-n, and B((OPr)-Pr-i)(3) followed by acidic hydrolysis. Applications of these benzoboroxoles have been demonstrated in Pd-catalyzed cross-coupling reactions and the protocol has been extended for the synthesis of a chiral benzoboroxole. Exceptionally short synthesis of a potent antifungal agent AN2690 and several of its analogs has also been realized. (C) 2007 Elsevier Ltd. All rights reserved.
A Strategy To Obtain <i>o</i>-Naphthoquinone Methides: Ag(I)-Catalyzed Cyclization of Enynones for the Synthesis of Benzo[<i>h</i>]chromanes and Naphthopyryliums
作者:Feng Wu、Shifa Zhu
DOI:10.1021/acs.orglett.9b00281
日期:2019.3.1
of 2-alkenylphenyl alkynyl ketones and its [4 + 2] annulations with styrenes has been developed. This reaction features high efficiency, mild reaction conditions, as well as flexible substitutions and atom economy. The obtained benzo[h]chromane products were further oxidized to naphthopyryliums, which displayed tunable photophysical properties.
已开发出一种通过Ag(I)催化2-烯基苯基炔基酮的环化反应及其[4 + 2]与苯乙烯的环化反应,通过成环策略获得o -NQM中间体的新策略。该反应具有高效,温和的反应条件,灵活的取代和原子经济性等特点。所获得的苯并[ h ]苯并二氢吡喃产物被进一步氧化成萘并具有可调节的光物理性质。
Divergent Access to Benzocycles through Copper‐Catalyzed Borylative Cyclizations
作者:Wan Seok Yoon、Jung Tae Han、Jaesook Yun
DOI:10.1002/adsc.202100812
日期:2021.11.9
A copper-catalyzed chemodivergent approach to five- and six-membered benzocycles from dienyl arenes tethered with a ketone has been developed. Through proper choice of coordinating ligands and catalytic conditions, copper-catalyzed borylativecyclization of a single dienyl arene can be diverted to two different pathways, leading to indanols and dihydronaphthalenols with high stereoselectivity. The
已经开发了一种铜催化化学发散方法,用于从与酮相连的二烯基芳烃制备五元和六元苯并环。Through proper choice of coordinating ligands and catalytic conditions, copper-catalyzed borylative cyclization of a single dienyl arene can be diverted to two different pathways, leading to indanols and dihydronaphthalenols with high stereoselectivity. 手性双齿双膦配体 ( S , S )-Ph-BPE 最适用于通过船状过渡态将铜烯丙基不对称加成到系链酮上,而 NHC 配体导致硼烯丙基加成产生具有高非对映选择性的茚满醇。