作者:Hong Pan、Man-Yi Han、Pinhua Li、Lei Wang
DOI:10.1021/acs.joc.9b01945
日期:2019.11.1
The unique reactivity of water in the direct catalytic vinylogous aldol reaction of silyl glyoxylates is reported. With the hydrogen-bonding networks from water, the unfavorable homogeneous reactions in organic solvents were severely suppressed, and the "on water" relay chemistry for the vinylogous aldol reaction was realized in heterogeneous conditions (water as solvent), providing the desired α-hydroxysilanes
据报道,在乙醛酸甲硅烷基酯的直接催化乙烯基醇醛醇醛反应中,水具有独特的反应性。通过水与氢的键合网络,可以严重抑制有机溶剂中不利的均相反应,并且在非均相条件下(水为溶剂)实现了乙烯基醇醛醇缩醛反应的“水上”中继化学反应,从而提供了所需的α-羟基硅烷具有高产的季碳中心。此外,还展示了对水在生物系统中作用的新见解。