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Ph3As-Catalyzed Wittig-Type Olefination of Aldehydes with Diazoacetate in the Presence of Na2S2O4

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journal contribution
posted on 17.08.2007, 00:00 by Peng Cao, Chuan-Ying Li, Yan-Biao Kang, Zuowei Xie, Xiu-Li Sun, Yong Tang
In the presence of sodium hydrosulfite and a catalytic amount of AsPh3 and Fe(TCP)Cl, aldehydes react with ethyl diazoacetate to give the corresponding α,β-unsaturated esters in high yields with excellent stereoselectivities (E/Z > 50/1).