Synthesis 2021; 53(20): 3725-3734
DOI: 10.1055/a-1509-5655
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Aldol–Tishchenko Reaction of α-Oxy Ketones: Diastereoselective Synthesis of 1,2,3-Triol Derivatives

Carlos Sedano
,
Cintia Virumbrales
,
Samuel Suárez-Pantiga
,
Roberto Sanz
This work was supported by the Ministerio de Ciencia e Innovación (CTQ2016-75023-C2-1-P), and Consejería de Educación, Junta de Castilla y León and FEDER (BU291P18, BU049P20). The project leading to these results has also received funding from the “la Caixa” Foundation, under agreement LCF/PR/PR18/51130007 (CAIXA-UBU001). Postdoctoral contracts (S.S.-P. and C.V.) and a predoctoral contract (C.S.) were funded by Consejería de Educación, Junta de Castilla y León and FEDER, and Ministerio de Educación (FPU), respectively.


To the memory of Prof. Dr. V. Snieckus

Abstract

α-Oxy ketones, easily accessible by conventional routes, can be selectively deprotonated generating an enolate intermediate, which upon treatment with paraformaldehyde undergoes an aldol–Tishchenko reaction, leading to relevant 1,2,3-triol fragments in a totally diastereoselective manner. The excellent stereocontrol in the generation of a quaternary stereocenter is attributed to stereoelectronic effects in the Evans intermediate. This methodology allows overcoming some limitations of our previously reported strategy, based on the reaction of α-lithiobenzyl ethers with esters and paraformaldehyde, broadening the scope of the obtained polyols. Synthetic applications of this process include the preparation of a new dilignol model and some functionalized oxetanes.

Supporting Information



Publication History

Received: 15 April 2021

Accepted after revision: 17 May 2021

Accepted Manuscript online:
17 May 2021

Article published online:
21 June 2021

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