Ortho-Dearomatization of Phenols Creating All-Carbon Spiro-Bicycles
摘要:
A range of alkene-linked phenols are generally and reliably dearomatized specifically at their ortho-positions to create all-carbon quaternary stereogenic centers at the corresponding spiro-ring junctions, thus establishing a viable solution to the long-standing synthetic challenge.
Radical-induced expeditious stereoselective synthesis of 2-alkyl 3-allyl <i>trans</i>-2,3-dihydrobenzofurans (TADHBs)
作者:Debayan Sarkar、Sushree Ranjan Sahoo
DOI:10.1080/00397911.2017.1415357
日期:2018.3.4
ABSTRACT A thorough study on radical-induced cyclopropyl ring fragmentation with encompassed olefinic and cyclopropane environment has been performed. Interestingly, the fragmentation has occasioned onto a stereoselective synthesis of 3-allyl trans-2,3-dihydrobenzofurans with impressive yields. The trans-dihydrobenzofurans are present as central core in many molecules of medicinal interest and the
Synthesis of 4-arylcoumarins via palladium-catalyzed arylation/cyclization of ortho-hydroxylcinnamates with diaryliodonium salts
作者:Yang Yang、Jianwei Han、Xunshen Wu、Shujia Xu、Limin Wang
DOI:10.1016/j.tetlet.2015.04.082
日期:2015.6
ortho-hydroxylcinnamate ester derivatives by using diaryliodonium(III) salts has been developed. With this method, 4-arylcoumarins were easily prepared in good to excellent yields under base-free conditions. Additionally, this protocol provided an efficient alternative for the preparation of related 4-arylated coumarin compounds which are useful in the access to 5-lipoxygenaseinhibitors.
Controlling Stereoselectivity in Tribromide Mediated Oxidative Dearomatisations - Synthesis of Selective Spirofurano-naphthalones
作者:Debayan Sarkar、Puspendu Kuila、Devashish Sood
DOI:10.1002/ejoc.201900974
日期:2019.9.15
A mild and highly stereocontrolled tribromide mediatedsynthesis of spiro‐furano naphthalones via a oxidative dearomatisation process is reported.
据报道,通过氧化脱芳香化过程,温和且高度立体控制的三溴化物介导的螺-呋喃酮萘的合成。
<i>Ortho</i>-Dearomatization of Phenols Creating All-Carbon Spiro-Bicycles
作者:Chao Zheng、Lu Wang、Jingjie Li、Leifeng Wang、David Zhigang Wang
DOI:10.1021/ol401863k
日期:2013.8.16
A range of alkene-linked phenols are generally and reliably dearomatized specifically at their ortho-positions to create all-carbon quaternary stereogenic centers at the corresponding spiro-ring junctions, thus establishing a viable solution to the long-standing synthetic challenge.