Figure 2.

Evaluation of nitrogen-precursors as possible self-immolative donors (A) and comparison of products obtained from the reaction of 1a with Ir, HCOONa, and 10 (B). In Part B, no secondary (4a) and tertiary (5a) products were obtained. The reaction products were derivatized by treatment with ethyl chloroformate and then quantified by gas chromatography using an internal standard. Products not detected are marked with an asterisk (*) above the corresponding column. Yield % = [(moles of product formed × reaction stoichiometry/moles of starting aldehyde) × 100].