甲醛

The first asymmetric total synthesis of coumarinolignoids Daphneticin and it's enantiomer was accomplished starting from 7-hydroxycoumarin and 3, 4, 5-trimethoxybenzaldehyde, in which Sharpless asymmetric dihydroxy reaction was used to construct chiral center, and Mitsunobu reaction was used to obtain desired configuration.

并以7-羟基香豆素和3，4，5-三甲氧基苯甲醛为起始原料，用Sharpless不对称双羟化反应构筑手性中心，用Mitsunobu偶联反应作为关键步骤，合成了手性的香豆素木脂素Daphneticin及其异构体。

The adoption of indoor air quality testing instruments, is currently the only site testing at the same time indoor formaldehyde, ammonia, stupid, a stupid, stupid dimethoxy, TVOC (Total Volatile Organic Compounds) and other harmful gases apparatus.

公司采用的室内空气质量检测仪，目前国内唯一的可同时现场检测室内甲醛、氨、笨、甲笨、二甲笨、TVOC等有害气体的仪器。

From the point view of product distribution, conversion of dimethyl ether and energy consumption, with RCD plasma DME conversion was higher and was hardly affected by the residence time of dimethyl ether, and hydrogen, carbon monoxide and unsaturated hydrocarbons with RCD plasma were more than those with DBD plasma.There was no liquid product with RCD plasma, but the liquid product obtained with DBD plasma consisted of aldehydes, alcohols and methoxy-containing organic compounds, for instance, formaldehyde, methyl alcohol, dimethoxy ethane and so on.Moreover, most compositions of liquid product were methoxy-containing compounds, and the liquid product selectivity was as high as 32.23%.However, energy consumption for the reaction with DBD plasma was more than that with RCD plasma.

从产物分布、转化率及能耗上看，利用RCD所获得的二甲醚的转化率高，几乎不受二甲醚停留时间的影响，且氢气、一氧化碳和不饱和烃的含量大，几乎没有液相产物，而利用DBD能获得较多的液相产物，包括一些醇、醛和含有甲氧基的有机化合物，如甲醛、甲醇和二甲氧基乙烷，且大部分组成都是含有甲氧基的化合物，液相产物的选择性高达32.23％，但是能耗较大。

Leuco crystal violet lactone was prepared by heating the mixture of dimethylaniline, p- dimethylaminobenzaldehyde and m- dimethylaminobenzoic acid at 60 ℃ for 5 hours in presence of hydrochioric acid and unea and in the nitrogen atmosphere with 72% yield of LCVL.

等摩尔比的N，N-二甲基苯胺和对二甲氨基苯甲醛在盐酸和脲的存在及氮气保护下，80℃反应0.5h，加入间二甲氨基苯甲酸于90℃反应5h。将反应混合物中和，抽滤，得到无色结晶紫内酯，产率为72%。

Leuco crystal violet lactone was prepared by heating the mixture of dimethylaniline, p-dimethylaminobenzaldehyde and m-dimethylaminobenzoic acid at 60℃ for 5 hours in presence of hydrochloric acid and urea and in the nitrogen atmosphere with 72%yield of LCVL.

等摩尔比的N，N-二甲基苯胺和对二甲氨基苯甲醛在盐酸和脲的存在及氮气保护下，80℃反应0.5h，加入间二甲氨基苯甲酸于90℃反应5h。将反应混合物中和，抽滤，得到无色结晶紫内酯，产率为72%。

Methods 151 cars used for different periods of time were selected and the concentrations of formaldehyde,benzene,toluene,dimethylbenzene and TVOC were detected.

方法选择使用不同年限的151辆小汽车，分别测定车厢空气中甲醛、苯、甲苯、二甲苯、TVOC的浓度，同时对驾驶人员的不良反应进行调查。

Methods To detect benzene,methylbenzene, dimethylbenzene ,and formaldehyde levels in indoor air of 48 rooms decorated in different seasons.

方法在春夏季(4~9月)和秋冬季(1~3月，10~12月)选择装修完毕3个月左右尚未入住的居室48户，检测室内空气中的苯、甲苯、二甲苯和甲醛浓度，并进行比较。

Results The exceed standard rates of benzene, methylbenzene, dimethylbenzene, formaldehyde in indoor air were 11.39%, 14.58%, 7.64% and 38.17% respectively.

结果 室内空气中苯、甲苯、二甲苯和甲醛的超标率分别为11.39%、14.58%、7.64%和38.17%。

Methods The levels of formaldehyde, benzene, toluene and dimethylbenzene indoors at different time after decoration were determined with methods described in GB11737 and the dwellers' adverse reaction with a given questionnaire was surveyed????

选择装饰竣工后不同时期的居室，分别测定室内空气中甲醛、苯、甲苯、二甲苯的浓度，同时对居留者的不良反应进行调查。

In the third part of this dissertation, based on the leading compound ACPD, we design and asymmetric syhthesized two analogues: 56 and 57 by using Seebach's self- regeneration strategy to synthesize α,α-disubstituted amino acid as the key step.

论文的第二部分，我们利用我们所开发的合成α，α双取代氨基酸的方法，以对甲基苯甲醛为原料，经过分子内付克烷基化、氧化银氧化和氢化等16步反应，完成了代谢型谷氨酸受体拮抗剂-AIDA的不对称合成。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。