 new methods and strategies for the direct functionalization of c  
 h bonds are beginning to reshape the fabric of retrosynthetic analysis , impacting the synthesis of natural products , medicines , and even materials1 . 
 the oxidation of allylic systems has played a prominent role in this context as possibly the most widely applied c  
 h functionalization due to the utility of enones and allylic alcohols as versatile intermediates , along with their prevalence in natural and unnatural materials2 . 
 allylic oxidations have been featured in hundreds of syntheses , including some natural product syntheses regarded as  classics3 . despite many attempts to improve the efficiency and practicality of this powerful transformation , 
 the vast majority of conditions still employ highly toxic reagents ( based around toxic elements such as chromium , selenium , etc . ) or expensive catalysts ( palladium , rhodium , etc.)2 . 
 these requirements are highly problematic in industrial settings ; currently , no scalable and sustainable solution to allylic oxidation exists . as such , 
 this oxidation strategy is rarely embraced for large - scale synthetic applications , limiting the adoption of this important retrosynthetic strategy by industrial scientists . in this manuscript 
 , we describe an electrochemical solution to this problem that exhibits broad substrate scope , operational simplicity , and high chemoselectivity . 
 this method employs inexpensive and readily available materials , representing the first example of a scalable allylic c  h oxidation ( demonstrated on 100 grams ) , finally opening the door for the adoption of this c  h oxidation strategy in large - scale industrial settings without significant environmental impact . 
Supplementary Material