Click Approaches to Functional Water-Sensitive Organotriethoxysilanes
作者:Kristýna Bürglová、Nirmalya Moitra、Jana Hodačová、Xavier Cattoën、Michel Wong Chi Man
DOI:10.1021/jo201484n
日期:2011.9.16
The derivatization of functional organic fragments with triethoxysilyl groups to afford hydrolyzable organosilanes with targeted properties using the copper-catalyzed alkyne azide cydoaddition reaction under strictly anhydrous conditions is described according to two approaches, starting from five silylated substrates. This high yield, fast, and selective method is applicable to a wide range of substrates and is expected to lead to important achievements in the field of functional hybrid silica.
Synthesis of Arylnaphthalene Lignan Scaffold by Gold-Catalyzed Intramolecular Sequential Electrophilic Addition and Benzannulation
作者:Vanajakshi Gudla、Rengarajan Balamurugan
DOI:10.1021/jo201918d
日期:2011.12.16
an arylnaphthalene lignan scaffold in high yields is presented. It involves a sequential intramolecular electrophilic attack of carbonyl on arylalkyne followed by benzannulation catalyzed by gold salt. AuCl3 in combination with AgSbF6 works better to effect this transformation. Selected products have been converted into arylnaphthalene lactone natural products such as justicidin E, taiwanin C, and