In order to find highly active pesticide, three series of 5--12-substituent-benzo phenanthridine derivatives were synthesized through the reaction of 2-methylbenzonitrile with dif-ferent aldehyde, and further dehydration with DDQ or N-methylation with NaH and CH3I, respectively.

為了尋找新的高活性農(nóng)藥精品首页，利用2-甲基苯甲腈與不同的醛反應(yīng)99色免费，再通過2700万AV毛片导航，3-二氯－5，6-二氰基－1日韩淫乱毛片，4-苯醌脫氫或NaH和CH3I氮甲基化www.13色哟哟，合成了3個(gè)系列共18個(gè)5-取代氨基－12-取代苯并菲啶衍生物，其中15個(gè)是未見文獻(xiàn)報(bào)道的化合物免费无码一级A片特大黄。

The reactions of benzaldehydes bearing an ortho substituent group on the phenyl ring with propargyl bromide may yield a mixture of regioisomers (homopropargyl and homoallenyl alcohols) or a single homoallenic alcohol due to the steric effect.

鄰位上的取代基由于位阻原因往往使反應(yīng)得到含有高丙二烯醇和高炔丙醇的混合物或者單一的高丙二烯醇www.午夜。

The substituents on 2 and 4 position of furan ring were derived from the propargylic part of homopropargylic alcohol, and the substituent on 5 position of furan ring was derived from the

其呋喃環(huán)上2號(hào)及4號(hào)位置的取代基乃源自於高炔丙基醇之炔丙基，5號(hào)位置的取代基乃源自於醇之偕位992tv人人草，故藉此方法合成之碘化呋喃化合物具有高度的位向選擇性免费一级a一片一久久。

A range of oligoaryls having alternating para- or meta-benzene-furan rings is synthesized by rapid convergent/divergent method from the annlation of a propargylic dithioacetal and an aldehyde having a propargylic dithioacetal moiety as the substituent.

中文摘要結(jié)合分流法/匯集法，利用炔丙基硫縮酮單體和另一具有醛基的單體進(jìn)行環(huán)化反應(yīng)www.26uuu.com，可以迅速合成對位及間位取代苯環(huán)呋喃交錯(cuò)寡聚物小蝌蚪国产。

It can be proposed that when the substituent is an electron donor, the twisted configuration between pyrazoline ring and the moiety attached on N1 is the fluorescence-emitted configuration of 2-pyrazoline, and the configuration where two moieties are placed in a co-plane is the best non-radiative decay configuration of these compounds.

這表明，對于C3位取代基為推電子基或弱的拉電子基團(tuán)的化合物欧美国产在线观看，N1所聯(lián)取代基與吡唑啉環(huán)相扭曲的構(gòu)象是化合物的發(fā)光構(gòu)象无遮挡又黄又爽又刺激的免费视频，兩者處于同一平面的構(gòu)象是化合物的最佳非輻射衰變構(gòu)象，與C3所聯(lián)取代基的旋轉(zhuǎn)扭曲無關(guān)最近免费中文字幕大全图片。

Substituent effect of pyrazoles was also investigated by DNMR and DFT.We successfully synthesized these intermediates with exclusively-conformations in a mild condition. X-ray results show that substituents in the pyrazolyl ring affect greatly on the structures of products, especially theπdelocation of the fragment 1-metal-butadiene.

本文以取代吡唑和1-炔基Fischer卡賓化合物的Michael加成反應(yīng)合成了12個(gè)-型β-吡唑基烯基卡賓化合物污视频在线观看国产网站，反應(yīng)條件溫和。X-ray晶體衍射顯示吡唑上取代基對產(chǎn)物結(jié)構(gòu)2021亚洲精品自拍视频，特別是1-M-丁二烯的共軛程度具有較大的影響欧美在线特级黄片。

This paper compared two kinds of rose families sorbus of different effective spots of total flavonids content. We get a better process of total flavonoids abstraction from the branch of Sorbus tianschanica,.Under the best process of total flavnoids ,two flavnoids were isolated from them. Preliminary affirmed two kinds of compounds belong to flavanone, two kinds of structure just substituent had a dissimilarity separately. This thesis was a part of a national natural science fund to subsidize.

除此，本論文還對新疆天山花楸的枝干總黃酮的提取工藝進(jìn)行了研究人人舔人人干人人操，得到了最佳提取工藝国产一区在线免费观看，在最佳提取工藝的條件下對新疆天山花楸的枝干進(jìn)行了系統(tǒng)的提取和硅膠柱層析，得到兩種化合物国产99久久久国产精品电影免费，初步認(rèn)定兩種化合物屬于二氫黃酮類www三级片，兩種化合物的結(jié)構(gòu)相似，只是個(gè)別取代基有所不同色香视频永久地址，本論文是國家自然科學(xué)基金資助項(xiàng)目色色色校区。

A convenient method to synthesize three kinds of novel 2-(2-hydroxyphenyl) benzimidazole in order to improve the solubilities of the fluorophores with substituent of carboxyl, ester and double-bond which are aimed for determining the sulphydryl group was reported.

合成了N-{3-(2-苯并咪唑基)-4-羥基苯基}馬來酰亞胺酸， N-{3-(2-苯并咪唑基)-4-乙酸酯基苯基}和馬來酰亞胺N-{3-(2-苯并咪唑基)-4-羥基苯基}馬來酰亞胺那个有毛片网站，在基本熒光發(fā)射團(tuán)上分別引入了羧酸基久久这里都是精品；酯基；雙鍵活性基團(tuán)色天堂网。

In the first part, the prototropic hydroxy-oxo tautomerisms of 2 (1H)- pyridones/2-hydorxypyridines, one of the most important model systems in molecular biology, have been investigated with self-consistent reaction field method based on continuum model. The influence of the nature and position of substituent groups, the existence of intramolecular hydrogen bonding and tautomeric competition between 2-hydroxy and 4-hydroxy on the tautomeric equilibria have also been examined.

第一部分上别人丰满人妻毛片，首先從溶劑敏感的異構(gòu)化性質(zhì)入手，用基于連續(xù)介質(zhì)的自洽反應(yīng)場理論方法對一類重要的生化模型體系—2（1H）-吡啶酮／2-羥基吡啶互變異構(gòu)體系進(jìn)行了研究国产精品久久久久…，系統(tǒng)地考察了取代基性質(zhì)一级黄色片网址、取代基位置欧美性爱新地址、分子內(nèi)氫鍵的形成以及互變異構(gòu)競爭的存在對異構(gòu)化平衡的影響。

X-ray single crystal diffraction study reveals that the Zn atom is five-coordinated, Furthermore, a 2D superamolecular network is constructed via the tetracarboxylate bridged binuclear of Zinc SBU ,and the amino substituent results in the formation of hydrophilic 2D structure of the title complex.

該配合物中h黄漫高潮喷水在线观看，鋅離子為5配位美女网站是黄，2個(gè)Zn原子和4個(gè)羧基形成的雙核鋅結(jié)構(gòu)單元，進(jìn)而形成二維方格式平面結(jié)構(gòu)可以直接看的av网址站，氨基取代基導(dǎo)致配合物具有親水性干干干干干干干干干干干干干干干干操。