科研之友
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摘要
The 1:1 zwitterionic intermediates formed from the reaction of trialkyl phosphites with acetylenic esters were trapped by hydrazonoyl chlorides to yield dialkyl 4-(dialkoxyphosphoryl)-1-phenyl-3-aryl-4,5-dihydro-1H-pyrazole-4,5-dicarboxylates in good yields. This three-component synthesis of phosphorylated dihydro-1H-pyrazoles produces only one diasteromer.
- 出版日期2010-7
