Table 2. Conditions and Yields for the One-Pot Synthesis of N-Protected 1-Aminoalkylphosphonium Salts from Amides, Carbamates, Lactams, Imides, or Urea.

^aIsolated yields.

^bThe main reaction product is 2-carbamoylethyltriphenylphosphoniumtetrafluoroborate 14 (78%).

^cThe main reaction product is 1,1′-(carbonyldimino)bis(methyltriphenylphosphonium) bis(tetrafluoroborate) 15 (84%; the molar ratio of substrates equals 1(urea): 2:2).