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Divergent Protosilylation and Protoborylation of Polar Enynes
Fei-Fan Meng1, Qi-Yan Xue1, Bing Jiang1
1Department of Chemistry , University of Science and Technology of China , Hefei , Anhui 230026 , P. R. China.
Abstract:
Copper-catalyzed divergent conjugate protosilylation and protoborylation of polar enynes were developed. The corresponding β-boryldienoates and β-silyldienotes were obtained in moderate to good yields and with good stereoselectivity. In this protocol, novel cascade double protoborylation/protodeboronation processes of polar enynoates enabled access of the useful trisubstituted vinylboronates in up to 80% yield and with up to 98:2 Z/ E ratio. Moreover, divergent transformations of the products thus obtained were also investigated.
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