Synthesis and structure–activity relationships of bengazole A analogs
作者:Roger J. Mulder、Cynthia M. Shafer、Doralyn S. Dalisay、Tadeusz F. Molinski
DOI:10.1016/j.bmcl.2009.04.069
日期:2009.6
Analogs of the potent antifungal agent, bengazole A, were prepared and evaluated against Candida spp. in both microbroth dilution and disk diffusion assays.
制备了强效抗真菌剂苯并唑 A 的类似物,并针对念珠菌属进行了评估。在微量肉汤稀释和圆盘扩散试验中。
Synthesis of 2,4- and 2,5-Disubstituted Oxazoles via Metal- Catalyzed Cross-Coupling Reactions
作者:Carla M. Counceller、Chad C. Eichman、Nicolas Proust、James P. Stambuli
DOI:10.1002/adsc.201000668
日期:2011.1.10
The rapid synthesis of 2,4‐ and 2,5‐disubstituted oxazolesvia metal‐catalyzed cross‐coupling reactions is reported. The 4‐ or 5‐position of the corresponding 4‐ or 5‐halogenated 2‐butylthiooxazoles was successfully functionalized via Suzuki–Miyaura, Sonogashira and Stille cross‐coupling reactions. The 2‐position of the 2‐butylthiooxazoles obtained was further coupled to various organozinc reagents
Monosubstituted Oxazoles. 1. Synthesis of 5-Substituted Oxazoles by Directed Alkylation
作者:Cynthia M. Shafer、Tadeusz F. Molinski
DOI:10.1021/jo971410h
日期:1998.2.1
A general method is presented for synthesis of 2-(methylthio)-5-substituted oxazoles 2. Deprotonation of the readily available 2-(methylthio)oxazole (1) with n-BuLi occurs smoothly in the presence of TMEDA and regiospecifically at C5. The organometallic la added rapidly to aldehydes and other electrophiles to provide 5-substituted-2-(methylthio)oxazoles in very good to excellent yields. Reductive removal of the MeS group gave the desired 5-monosubstituted oxazoles 3 in good yield.
The invention relates to 2-(benzylsulfonyl)-oxazole derivatives, chiral 2-(benzylsulfinyl)-oxazole derivatives and 2-(benzylsulfanyl)-oxazole derivatives of general formula (I) and the salts thereof, wherein the individual radicals and indexes have the meaning indicated in the description. Also described are methods for the production thereof as well as the use of said compounds as herbicides and plant growth regulators, in particular as herbicides for selectively controlling weeds in plant crops.
Nickel-Catalyzed Synthesis of Oxazoles via C−S Activation
作者:Kyoungsoo Lee、Carla M. Counceller、James P. Stambuli
DOI:10.1021/ol900260g
日期:2009.3.19
The synthesis of 2-substituted oxazoles is achieved via nickel-catalyzed cross-couplingreaction of 2-methylthio-oxazole and various organozinc reagents. An extension of this method is demonstrated with a chemoselective, one-pot synthesis of unsymmetrical 2,5-disubstitutedoxazoles. This synthesis of 2- and 2,5-substituted oxazoles using this method provides great advantages over previous methods for