Total synthesis of batzelladine K (1), a marine guanidine alkaloid, was achieved based upon successive 1,3-dipolar cycloaddition reaction of cyclic nitrone. The relative and absolute stereochemistry of 1 was established by spectral comparison of the natural and synthetic products and the trans-isomer, which was also synthesized.
Total synthesis of batzelladine K (1), a marine guanidine alkaloid, was achieved based upon successive 1,3-dipolar cycloaddition reaction of cyclic nitrone. The relative and absolute stereochemistry of 1 was established by spectral comparison of the natural and synthetic products and the trans-isomer, which was also synthesized.