Recent advances in C(sp3)–H bond functionalization via metal–carbene insertions

The recent development of intermolecular C-H insertion in the application of C(sp(3))-H bond functionalizations, especially for light alkanes, is reviewed. The challenging problem of regioselectivity in C-H bond insertions has been tackled by the use of sterically bulky metal catalysts, such as metal porphyrins and silver(I) complexes. In some cases, high regioselectivity and enantioselectivity have been achieved in the C-H bond insertion of small alkanes. This review highlights the most recent accomplishments in this field.