查询词典 duff

Methods 4-Hydroxy- benzonitrile was treated with sodium hydrogen sulfide and anhydrous magnesium chloride in dimethyl formamide to give thioamide, which was then directly cyclized with ethyl 2-chloroacetoacetate without separation to give ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(2) in one-pot; then 2 was formylated with Duff reaction adopting hexamethylenetetramine in trifluoroacetic acid to give ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(3); finally, the target compound was obtained by the treatment of 3 with hydroxylamine hydrochloride and sodium formate in formic acid.

采用"一勺烩"方法，以4-羟基苯甲腈为起始原料，首先与硫氢化钠和无水氯化镁在N，N-二甲基甲酰胺中反应，所得中间体不经分离，直接加入2-氯乙酰乙酸乙酯进行环合反应，得到2-(4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（2）；然后通过六亚甲基四胺/三氟乙酸进行Duff反应，得到2-(3-甲酰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（3）；再经盐酸羟胺/甲酸/甲酸钠体系脱水得到目标化合物。

Mr. Duff, can you see me?

Mr.Duff，你能看见我吗？

And their onetime feud, which Duff once called "silly," is all in the past.

而她们的不和在Duff的一句"无聊"后成为了过去。

Duff: That's a song that says,'ok, everybody relax and listen.

duff：这就是一首大家放松心情去听的歌。

That system provides only for the Porter/Duff "over" operator.

原来的系统只提供了Porter/Duff的"覆盖"操作。

The main omissions are extended-precision arithmetic; the goto statement; nonstructured forms of switch such as Duff's device; passing struct and union parameters and results by value; and functions with variable numbers of arguments.

而忽略的主要是扩展精度类型的算术运算(long long和long double)； goto 语句；如达夫设备(Duff's device)之类的非结构化switch转移；结构体、联合体参数传递和结果值返回；以及带有变长参数的函数。

Rosie Duff has been raped, stabbed and left for dead in an ancient Pictish cemetery.

Rosie Duff被奸杀了，死在了一间古老的墓地里。

Teen starlet Hilary Duff claims she's never had a problem with her weight, but feels pressure to be thin.

年轻的偶像Hilary Duff声称在她的体重上从没出现过问题，不过在瘦了以后感觉到压力。

Now all cleaned up and studying for a business degree from Seattle University, he's in GN'R supergroup Velvet Revolver, singer of his own rock band Loaded, and even writes a financial column for Playboy.com. So read on if you can't get enough of that wonderful Duff

但现在不但全都戒掉了，还从西雅图大学取得了商业学位，而且在枪与玫瑰以及丝绒左轮，以及他自己的摇滚乐团子弹上膛，甚至还帮Playboy.com写了经济专栏，如果你还不知道Duff有多麼的美好，读吧！！

Keywords 5-nitrosaicy|aldehyde polyphosphoric acid formylation Duff reaction

5-硝基水杨醛；多聚磷酸；甲酰化； Duff反应

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。