Short and Efficient Synthesis of Alkyl- and Aryl-Ortho-Hydroxy-Anilides and their Antibiotic Activity

Bioinspired Synthesis of Platensimycin from Natural ent-Kaurenoic Acids

The biomimetic formal synthesis of the antibiotic platensimycin for the treatment of infection by multidrug-resistant bacteria was accomplished starting from either ent-kaurenoic acid or grandiflorenic acid, each of which is a natural compound available in multigram scale from its natural source. Apart from the natural origin of the selected precursors, the keys of the described approach are the long-distance functionalization of ent-kaurenoic acid at C11 and the efficient protocol for the A-ring degradation of the diterpene framework.

Crystal structure of 3-(4-hydroxy-3-methoxyphenyl)-N-phenylpropanamide, C16H17NO3

C16H17NO3, orthorhombic, P212121 (no. 19), a = 7.9882 (2) Å, b = 11.4053 (3) Å, c = 16.2381 (5) Å, V = 1479.42 (7) Å3, Z = 4, R gt (F) = 0.0480, wR ref (F 2 ) = 0.0991, T = 173 K.