The products of the addition of ortholithiated
N,N-dialkylnaphthamides to aldehydes are pairs of
stable, diastereoisomeric atropisomers, formed with selectivities of up
to 90∶10 in favour of the syn-atropisomer.
2-Substituted N,N-diethyl or N,N-diisopropyl 1-naphthamides exist as stable atropisomers. When the 2-substituent is a 1-hydroxyalkyl group, the atropisomers are separable diastereoisomers. Synthesis of these compounds by the addition of aldehydes to ortholithiated N,N-dialkyl 1-naphthamides proceeds with moderate to good diastereoselectivity in favour of the aR*S* (syn) diastereoisomer.
Fungicides for the control of take-all disease of plants
申请人:Monsanto Company
公开号:US05994270A1
公开(公告)日:1999-11-30
Plant disease caused by soil-borne fungus Gaeumannonyces graminis (Gg) is controlled by applying to the seed or the soil a fungicide which has the following general formula: ##STR1##