Synlett 2024; 35(02): 196-204
DOI: 10.1055/a-2081-8907
account

Borylative Difunctionalization of Unsaturated Hydrocarbons Using Borylcopper Species


Abstract

This account summarizes the Cu-catalyzed borylative functionalizations of unsaturated hydrocarbons that we have developed over the past decade. First, we focus on the regioselective hydroboration of unsymmetrical internal alkynes and 1,2-dienes. Secondly, a borylative allyl–allyl coupling using 1,2-dienes, B2pin2, and an allyl phosphate is presented. Thirdly, we introduce the boroacylation and boroformylation of 1,2-dienes by using an acid anhydride or formate, respectively, as the electrophile. Lastly, we describe the synthesis of 2-boryl-1,3-butadienes and cyclic allylborates. These reactions offer a versatile method for synthesizing a broad range of useful compounds and also provide a detailed understanding of the reaction mechanism, which could lead to the development of catalysts that are both more efficient and more selective.

1 Introduction

2 Hydroboration of Alkynes

3 Hydroboration of 1,2-Dienes and 1,3-Dienes

4 Synthesis of 2-Boryl-1,3-butadienes

5 Boroallylation of 1,2-Dienes

6 Boroacylation of 1,2-Dienes

7 Boroformylation of 1,2-Dienes and 1,3-Dienes

8 Synthesis of Cyclic Allylborates

9 Conclusion and Outlook



Publication History

Received: 11 April 2023

Accepted after revision: 26 April 2023

Accepted Manuscript online:
26 April 2023

Article published online:
05 June 2023

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