Chiral 1,2,4-triazole derivatives as potential synthetic intermediates
摘要:
The potential of (S,S)-3,5-bis(alpha-trimethylsilyloxyethyl)-1,2,4-triazole 3 and (S,S)-3,5-bis(alpha-methoxyethyl)-1,2,4-triazole 9 as chiral synthetic intermediates has been investigated. Reaction of the chiral triazole 3 with ethyl 2-bromopropionate and subsequent treatment with LDA followed by quenching with an electrophile gave either esters 5 or lactones 6&7 in good yields with generally excellent diastereoselectivities. (C) 1996 Elsevier Science Ltd
Chiral 1,2,4-triazole derivatives as potential synthetic intermediates
摘要:
The potential of (S,S)-3,5-bis(alpha-trimethylsilyloxyethyl)-1,2,4-triazole 3 and (S,S)-3,5-bis(alpha-methoxyethyl)-1,2,4-triazole 9 as chiral synthetic intermediates has been investigated. Reaction of the chiral triazole 3 with ethyl 2-bromopropionate and subsequent treatment with LDA followed by quenching with an electrophile gave either esters 5 or lactones 6&7 in good yields with generally excellent diastereoselectivities. (C) 1996 Elsevier Science Ltd