alternative routes leading to a wide scope of VBX reagents have been developed. Heteroatom-substituted VBX reagents (X-VBX) have been utilized in highly diastereoselective synthesis of complex heteroalkenes. Yoshikai and coworkers introduced the corresponding vinylbenziodoxoles (VBO), which have found many applications especially in transition metalcatalyzed transformations. While the utility of VBX and VBO in photocatalytic reactions remains underexplored, the corresponding alkynylations with ethynylbenziodoxolones (EBX) are well investigated. Thus, we set out to develop a general, photocatalytic synthesis of functionalized alkenes and C-vinyl glycosides under mild and transition metal-free conditions, using VBX and VBO reagents (Scheme 1c). We selected DHPs as radical precursors, as they are easily synthesized from the corresponding aldehydes and widely utilized as versatile alkylation reagents in photoredox reactions. Herein, we report the successful outcome of this study, giving access to functionalized (E)-and (Z)-alkenes with retention of the alkene configuration from VBX/VBO.