Enantioselective Copper‐Catalyzed Formal [2+1] and [4+1] Annulations of Diynes with Ketones via Carbonyl Ylides
作者:Lin‐Jun Qi、Cui‐Ting Li、Zheng‐Qi Huang、Jia‐Tian Jiang、Xin‐Qi Zhu、Xin Lu、Long‐Wu Ye
DOI:10.1002/anie.202210637
日期:2022.10.24
A copper-catalyzed asymmetric formal [2+1] and [4+1] annulation of diynes with ketones via carbonyl ylides is disclosed. This protocol enables the divergent, practical and atom-economical synthesis of a range of chiral oxiranes and dihydrofurans in moderate to excellent yields with generally excellent enantioselectivities and diastereoselectivities.
Carbocation-Catalyzed Intramolecular and Intermolecular Carbonyl-Alkyne Metathesis Reactions
作者:Jasnoor S. Mann、Binh Khanh Mai、Thanh Vinh Nguyen
DOI:10.1021/acscatal.2c06016
日期:2023.2.17
metathesis (CAM) reaction is a versatile, stereoselective, and atom-economical method to access a diverse range of α,β-unsaturated carbonyl compounds, which are useful synthetic precursors and constitute an important structural motif in biologically active substances. In this work, we developed an efficient organic Lewis acid catalytic system to promote both the intramolecular and intermolecular CAM reactions
Gold-Catalyzed Cascade Cycloisomerization of 3-Allyloxy-1,6-diynes to Cyclopropyl- and Cyclobutyl-Fused Benzofurans and Chromen-3a(1<i>H</i>)-ols
作者:Zeliang Wang、Jichao Chen、Lei Yu、Chunyu Zhang、Weidong Rao、Philip Wai Hong Chan
DOI:10.1021/acs.orglett.4c00705
日期:2024.4.5
A synthetic method for the efficient preparation of partially hydrogenated benzo[f]cyclobuta[cd]cyclopenta[h]benzofurans and cyclopropa[c]chromen-3a(1H)-ols that relies on the gold(I)-catalyzed cascade cycloisomerization of 3-allyloxy-1,6-diynes is described.
一种依赖金(I)催化的级联环异构化高效制备部分氢化苯并[ f ]环丁[ cd ]环戊[ h ]苯并呋喃和环丙[ c ]色烯-3a( 1H )-醇的合成方法描述了3-烯丙氧基-1,6-二炔。
Electrochemically driven regioselective organoselenation for selective synthesis of β- hydroxy substituted selanylated ketones
作者:Musarrat Fatma、Faiz Ahmed Khan
DOI:10.1016/j.tetlet.2024.155051
日期:2024.5
efficient approach towards the synthesis of -hydroxy selanylated ketones was developed from easily accessible chalcones and diphenyl diselenide through an electrochemical pathway. In this technique, diphenyl diselenide and water are the source of PhSe and hydroxyl (–OH) groups that can be inserted at the and positions respectively producing -hydroxy selanylated ketones in moderate to good yields. The