Work

Boron Enabled Directed [2+2]‐ and Dearomative [4+2]‐Cycloadditions Initiated by Energy Transfer

Year: 2024

Type: article

Abstract: A strategy for the photosensitized [2+2]‐cycloaddition between styrenyl dihaloboranes and unactivated allylamines to access cyclobutylboronates with control of stereochemistry and regiochemistry is presented. The success of the reaction relies on the temporary coordination between in situ generated dihaloboranes and amines under mild reaction conditions. In addition, cyclobutanes with varying substitution patterns have been prepared using N ‐heterocycles as directing group. Manipulation of the C−B bond allows for the synthesis of a diverse class of cyclobutanes from simple precursors. Moreover, these reactions lead to the synthesis of complex amines and heteroaromatic compounds, which have significant utility in medicinal chemistry. Finally, a dearomative [4+2]‐cycloaddition of naphthalenes using a boron‐enabled temporary tethering strategy has also been uncovered to synthesize complex 3‐dimensional borylated building blocks.

Source: Angewandte Chemie

DOI: 10.1002/ange.202416215

Authors: Souvik Adak, Partha Sarathi Hazra, Carter B. Fox, M. Kevin Brown

Institutions: Indiana University Bloomington, Indiana University

Language: English

Topic: Organoboron and organosilicon chemistry

Subfield: Organic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $5,250

Funders: Foundation for the National Institutes of Health, Division of Chemistry