Chemoselective Aerobic Cross-Dehydrogenative Coupling of Terminal Alkynes with Hydrosilanes by a Nanoporous Gold Catalyst
作者:Rahul D. Kavthe、Yoshifumi Ishikawa、Indra Kusuma、Naoki Asao
DOI:10.1002/chem.201803874
日期:2018.10.22
Aerobic cross‐dehydrogenative coupling between terminal alkynes and hydrosilanes occurred in the presence of nanoporous gold catalyst under O2 atmosphere. A variety of alkynylsilanes were synthesized in good‐to‐high yields and the catalyst was easily recovered and reused many times. Furthermore, the chemoselective direct silyl protection of terminalacetylenes of alkynols over the hydroxyl groups was
作者:Mark E. Layton、Carl A. Morales、Matthew D. Shair
DOI:10.1021/ja016585u
日期:2002.2.1
An enantioseletive, biomimeticsynthesis of (-)-longithorone A has been achieved using an intermolecular/transannular Diels-Alder sequence which provides some support for the proposed biosynthesis. The cycloaddition precursors were two [12]-paracyclophanes that were constructed with atropisomer control during ene-yne metathesis macrocyclizations.
已经使用分子间/跨环 Diels-Alder 序列实现了 (-)-longithorone A 的对映选择性仿生合成,该序列为所提出的生物合成提供了一些支持。环加成前体是在烯-炔复分解大环化过程中用阻转异构体控制构建的两个 [12]-对环芳烃。
Chromium/Photoredox Dual Catalyzed Synthesis of
<i>α</i>
‐Benzylic Alcohols, Isochromanones, 1,2‐Oxy Alcohols and 1,2‐Thio Alcohols
作者:Subhabrata Dutta、Johannes E. Erchinger、Felix Schäfers、Ankita Das、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.202212136
日期:2022.12.5
The synthesis of α-benzylic alcohols, functionalized isochromanones, 1,2-oxy alcohols and 1,2-thio alcohols has been successfully achieved by employing a dual catalytic method combining chromium chemistry and photoredox catalysis. This presents a methodology under mild conditions with high functional group tolerance.