Two-Carbon Homologation of Aldehydes via Silyl Ketene Acetals. 2.<sup>1</sup> Study of the Stereochemical Control in the Formation of (<i>E</i>)-Alkenoic Acids
The condensation of C,O,O-tris(trimethylsilyl)keteneacetal 1 with aldehydes 2 in the presence of catalytic amounts of mercuriciodide at room temperature affords syn and anti beta-trimethylsiloxy alpha-trimethylsilyl alkanoic acid silyl esters 3 in good yields. These new compounds gave, under acidic or basic conditions, E and (or) Z enoic acids 4. The paths for the formation of these alkenoic acids
Enantioselective Synthesis of the 1,3‐Dienyl‐5‐Alkyl‐6‐Oxy Motif: Method Development and Total Synthesis
作者:Jie Wang、Chuning Guo、Yaqian Liu、Yunpeng Ji、Hongli Jia、Houhua Li
DOI:10.1002/anie.202400478
日期:2024.4.8
Method development and totalsynthesis have resulted in the enantioselective synthesis of the 1,3-dienyl-5-alkyl-6-oxy motif, and thus expedient total syntheses of three types of natural products (glutarimideantibiotics, α-pyrone polyketides and Lupin alkaloids), completed within 4–7 steps.