氢化

Three chiral phosphorus ligands were prepared using anisole as the startingat material.Their applications in the asymmetric hydroformylation and asymmetric conjug ed addition of diethylzinc to enones were investigated.

以苯甲醚为原料，合成了三种新的手性含磷配体，考察了三种配体在不对称氢甲酰化反应和ZnEt2对环己烯酮的不对称共轭加成反应中的应用。

In this thesis, a convenient and efficient synthesis of highly functionalizeddihydropyrido[2,3-d]pyrimidines via a double [5 + 1] annulation strategy startingfrom easily available α-alkenoyl-α-carbamoyl ketene--acetals 1 and cheapreagents (NH4OAc, DMF, and POCl3) has been developed.

本论文探索了一种简便有效的合成高度官能化的二氢吡啶并[2，3-d]嘧啶的方法，此方法由易得的α-乙酰基-α-氨基乙酰基二硫缩烯酮1和便宜的试剂(醋酸铵，二甲基甲酰胺和三氯氧磷)通过两步[5 + 1]加成而实现。

METHODS Antiemetic Ondansetron was synthesized from 1,2,3,9-tetrahydro-4H-carbazol-4-one via N-methylation,Mannich reaction and condensation.

方法以1，2，3，9四氢4H咔唑4酮经N甲基化、Mannich反应和缩合得止吐药昂丹司琼。

An aqueous solution of hydrogen ''.

溴化氢的水溶液，一种强液体酸。

An aqueous solution of hydrogen bromide that is a strong liquid acid.

溴化氢的水溶液，一种强液体酸。

Results Under normal production conditions, concentration of sulfuric acid, hydrochloric acid, arsenic hydrogen and sodium hydroxide which could cause occupational hazardous accidents met the occupational exposure limits.

结果 在正常的生产条件下引起职业病危害事故的硫酸、盐酸、砷化氢和氢氧化钠的浓度符合职业接触限值。

Keywords copper;the electrowinning;arsenic acid;economized energy;environmental protection

铜； 电积；砷化氢；节能；环境保护

Typical of the dopant chemistry is the reaction for arsine, which is depicted with the deposition process in Fig.

砷化三氢的反应是典型的掺杂化学反应，图9显示了该反应的淀积过程。

Methods 38 cases of confirmed acute arsine poisoning patients with kidney damage were conducted conventional renal ultrasonography, and compared with clinical manifestation and related biochemical examination results.

对已确诊的38例急性砷化氢中毒肾损害患者，进行常规肾脏超声检查，与临床表现和有关生化检查结果相对照。

To achieve such a miracle, the semiconductor industry has gone to extremes , using the world's most toxic substances like arsine, hydrofluoride and the like.

7 但是，为了这种"奇迹"，半导体技术也到了无所不用其极的地步，世上最剧毒的物质如砷化氢、氟化氢等都派上了用场。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。