Li Y1, Liu L1, Kong D1, Wang D1, Feng W2, Yue T2, Li C3.
J Org Chem. 2015 Jun 19;80(12):6283-90. doi: 10.1021/acs.joc.5b00728. Epub 2015 Jun 1.Direct alkynylation of Morita-Baylis-Hillman carbonates with (triisopropylsilyl)acetylene catalyzed by a Pd(OAc)2-NHC complex was developed "on water" to give the corresponding 1,4-enynes. The significant effects of water amount in the solvent on further transformations of 1,4-enynes were investigated.