Abstract
The Wolff rearrangement of α‐diazo carbonyl compounds has remained important in organic synthesis since its development more than 115 years ago. The risks involved in handling diazo compounds can be minimized by utilizing micro‐flow technology. In addition, photochemical Wolff rearrangement can be carried out efficiently with the aid of micro‐flow technology. Integrated micro‐flow synthesis is therefore well‐suited to the preparation of α‐diazo carbonyl compounds and their photochemical Wolff rearrangement. This review article summarizes recently reported micro‐flow photochemical Wolff rearrangements and their application in integrated micro‐flow syntheses.
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