Synthesis 2025; 57(02): 481-487
DOI: 10.1055/a-2413-7058
paper
Special Topic Dedicated to Prof. H. Ila

Photoinduced Stereoselective Giese Addition on Coumarins

Shashank Singh
,
Ravi P. Singh
Generous financial support from SERB-INDIA (CRG/2021/006502, SERB/SCP/2022/000599) and CSIR (02/0485/23/EMR-II) is gratefully acknowledged.


Abstract

Diastereoselective Giese addition on coumarin-3-carboxylate bearing a chiral auxiliary with N-hydroxyphthalimide ester to generate the corresponding alkylated adduct has been explored. Among screened chiral auxiliaries, bulkier one with appropriate steric hindrance is better for diastereoselective addition. Mechanistic studies involving fluorescence studies and On/Off experiments shed insight onto the plausible reaction pathway.

Supporting Information



Publication History

Received: 01 August 2024

Accepted after revision: 11 September 2024

Accepted Manuscript online:
11 September 2024

Article published online:
22 October 2024

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