例句
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R is tetramethylene, pentamethylene, or hexamethylene.
R为四甲撑 、 五甲撑或六甲撑.
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METHODS: The target compound was prepared by the bromination and amination reaction.
方法: 用溴代及胺化反应合成了四甲基吡嗪衍生物.
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The vapor phase concentration of durene could be adjusted by the self - made adjustor.
自制 的高熔点物料气相浓度调控仪能很好地调控气相中均四甲苯的浓度,具有推广应用价值.
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In low temperature, reaction of ketone with sodium acetylide synthesized 1 - ethynyl - 2,3, 4,5 - tetramethyl - 2 - cyclopentene - 1 - ol; 1,2 - diphenyl - 2 - hydroxy - 3 - butine - 1 - one; 3,4 - diphenyl - 1,5 - hexadiine - 3,4 - diol and 3,4 - dipheny
报道了在低温条件下, 以邻二酮和α-环烯酮为原料与炔钠反应,合成了2,3, 4,5-四甲基-1-乙炔基-2-烯-环戊醇、1, 2 - 二苯基 -2 - 羟基 -3 - 丁炔 -1 - 酮、3, 4 - 二苯基 -1,5-己二炔-3,4 - 二醇和3,4 - 二苯基 -3 - 环戊烯 -1 -酮4种化合物.