A unified approach to systematic isosteric substitution for acidic groups and application to NMDA antagonists related to 2-amino-7-phosphonoheptanoate
摘要:
A systematic approach to the replacement of acidic groups with potential bioisosteres is described. The strategy involves simple nucleophilic displacement of a common alkyl halide precursor with a variety of mercaptoazoles and related molecules. The mercaptoazoles and their oxidized derivatives (sulfinyl- and sulfonylazoles) represent a series of possible surrogates for acidic groups which span a pKa range from about 4.5-11.5. This simple strategy was extended to include 2-hydroxy- or 2-aminothiophenyl groups which function as relatively nonacidic isosteres for a phosphonic acid. By replacing the phosphonic acid of 2-amino-7-phosphonoheptanoate (AP-7) with these groups, we have synthesized novel N-methyl-d-aspartate (NMDA) antagonists.
Benzylsulfonyl diethylcarbamyl triazole and use as a selective herbicide
申请人:Gulf Oil Corporation
公开号:US04280831A1
公开(公告)日:1981-07-28
The novel compound having the structural formula ##STR1## is disclosed, as well as its use by pre-emergent application to control noxious grasses and some broadleaf weeds in cool season crops such as rape, sugar beets and flax.