Diastereoselective Friedel–Crafts Alkylation of Hydronaphthalenes
摘要:
An efficient and versatile synthesis of chiral tetralins has been developed using both inter- and intra-molecular Friedel Crafts alkylation as a key step. The readily available hydronaphthalene substrates were prepared via a highly enantioselective metal-catalyzed ring opening of meso-oxabicyclic alkenes followed by hydrogenation. A wide variety of complex tetracyclic compounds have been isolated with high levels of regio-, diastereo-, and enantioselectivity.
<scp>Cobalt‐Catalyzed</scp>
Enantioselec tive
<scp>Ring‐Opening</scp>
Reactions of Oxa‐ and Aza‐bicyclic Alkenes with Alkenylboronic Acids
作者:Di Zhu、Yongmei Zhao、Qinglei Chong、Fanke Meng
DOI:10.1002/cjoc.202100622
日期:2022.1.15
Catalytic enantioselective ring-opening of oxa- and aza-bicyclic alkenes with readily available accessible alkenylboronic acids, promoted by a chiral phosphine–Co complex, is reported. Such a process represents the unprecedented Co-catalyzed introduction of various alkenyl groups onto the oxa- and aza-bicyclic alkenes, affording a widerange of multisubstituted functionalized cyclohexenes in up to
据报道,在手性膦-钴配合物的促进下,氧杂和氮杂双环烯烃与容易获得的烯基硼酸催化对映选择性开环。这样的过程代表了前所未有的将各种烯基引入氧杂-和氮杂-双环烯烃上,以高达 98% 的收率和 99.5:0.5 er 提供范围广泛的多取代官能化环己烯。