ALILESTANANA QUIRAL ALILSILANO QUIRAL ANTIBIÓTICO ANTITUMORAL INDUCAO ASSIMETRICA ANTITUMOR AGENTS NATURAL PRODUCT ENOLATOS DE BORO ALDOL CONDENSATION ANTI ALDOL REACTION FELKIN-ADDITION CHIRAL ALLYLSILANE CHIRAL ALDEHYDES CHIRAL ALLYLSTANNANE CHIAL ALLYLSILANE CHIRAL ALPHA-AMINOALDEHYDES 1,3-AMINOALCOHOLS BETA-AMINOKETONES NATURAL PRODUCTS GAMA-AMINOALCOHOLS TRANSMETALLATION ALLYLSTANNANE NMR STUDY ON TRANSMETALLATION SINTESE TOTAL