Polycyclic<i>N</i>-hetero compounds. XXVII. Synthesis and investigation of the antidepressive activity of a B-Homo-11,13,15-triazasteroid and its related compoundsd
作者:Takashi Hirota、Katsuhiro Ieno、Kenji Sasaki
DOI:10.1002/jhet.5570230616
日期:1986.11
A synthesis of 1,2,5,6-tetrahydro-4H-benzo[3,4]cyclohepta[1,2-e]imidazo[1,2-c]pyrimidine (XII) having a novel ring system is described. Antidepressiveactivity of XII and its precursors VII-X was screened by inhibitory action of reserpine-induced hypothermia.
描述了具有新型环系统的1,2,5,6-四氢-4 H-苯并[3,4]环庚[1,2- e ]咪唑并[1,2- c ]嘧啶(XII)的合成。通过利血平诱导的体温过低的抑制作用筛选了XII及其前体VII-X的抗抑郁活性。
Dual-Function Cinchona Alkaloid Catalysis: Catalytic Asymmetric Tandem Conjugate Addition−Protonation for the Direct Creation of Nonadjacent Stereocenters
作者:Yi Wang、Xiaofeng Liu、Li Deng
DOI:10.1021/ja060312n
日期:2006.3.1
addition-protonation with efficient catalytic control of two nonadjacent stereocenters. As demonstrated in a concise and highly stereoselective formal total synthesis of (-)-manzacidin A, this asymmetric tandem reaction establishes a new and versatile catalytic approach for the enantioselective and diastereoselective creation of 1,3-tertiary-quaternary stereocenters.
催化串联不对称反应构成了直接从非手性前体在非环状分子中不对称构建非相邻立体中心的有力策略。在这篇通讯中,我们报告了在双功能金鸡纳生物碱催化剂的催化下,三取代的碳供体对 2-氯丙烯腈的高度对映选择性和非对映选择性加成。这代表了第一个不对称串联共轭加成-质子化,对两个不相邻的立体中心进行有效的催化控制。正如 (-)-manzacin A 的简洁且高度立体选择性的正式全合成所证明的那样,这种不对称串联反应为 1,3-叔-四元立体中心的对映选择性和非对映选择性创建建立了一种新的通用催化方法。
Polycyclic<i>N</i>-Heterocyclic Compounds. Part 79: Synthesis of 2,4-Disubstituted 6,7-Dihydro-5<i>H</i>-benzo[6,7]cyclohepta[1,2-<i>d</i>]pyrimidines as Potential Antiplatelet Aggregators
作者:Kensuke Okuda、Takashi Hirota、Kenji Sasaki
DOI:10.1002/jhet.1714
日期:2014.11
2‐substituted 4‐alkylamino‐6,7‐dihydro‐5H‐benzo[6,7]cyclohepta[1,2‐d]pyrimidines were synthesized as part of our research to develop new effective antiplatelet drugs. Several alkyl and aryl groups were used as substituents at the 2‐position. Evaluation of the effects of the newly synthesized compounds on collagen‐induced platelet aggregation revealed several promising antiplatelet candidates with potencies
为了开发新的有效抗血小板药物,我们合成了三环2-取代的4-烷基氨基-6,7-二氢-5 H-苯并[6,7]环庚[1,2- d ]嘧啶的文库。在2位使用几个烷基和芳基作为取代基。对新合成的化合物对胶原蛋白诱导的血小板凝集作用的评估显示,有几种有希望的抗血小板候选药,其功效优于阿司匹林。
Enantioselective Direct Amination
of α-Cyanoketones Catalyzed by Bifunctional Organocatalysts
作者:Dae Kim、Sun Kim、Ju Lee
DOI:10.1055/s-0028-1083510
日期:——
The catalytic enantioselective electrophilic α-amination promoted by chiral bifunctional organocatalysts is described. Treatment of α-cyanoketones with azodicarboxylates as electrophilic amination reagents under mild reaction conditions afforded the corresponding α-aminated α-cyanoketones with excellent enantiomeric excesses (87-99%).
Polycyclic N-Heterocyclic Compounds. Part 64: Synthesis of 5-Amino-1,2,6,7-tetrahydrobenzo[f]furo[2,3-c]isoquinolines and Related Compounds. Evaluation of Their Bronchodilator Activity and Effects on Lipoprotein Lipase mRNA Expression
dihydrofuran ring cleaved product, the structure of which was confirmed by X-ray crystallographic analysis. Effects of the newly synthesized compounds on carbamylcholine chloride-induced contractions of trachea and lipoproteinlipasemRNAexpression were also evaluated and found one promising bronchodilator.