The Pt-catalyzed hydrosilylation of equilibrating allylic azides is reported. The reaction provides only one out of four possible hydrosilylation products in good yields and with very high chemoselectivity (alk-1-ene vs. alk-2-ene), regioselectivity (linear vs. branched), and excellent functional group tolerance.
was found. The compounds under study are derived from condensed 1,2,4-triazolo[5,1-c][1,2,4]triazines and 1,2,4-triazolo[1,5-a]pyrimidines, structural analogues of natural nucleic bases. Antiherpetic activity and cytotoxicity of the compounds were studied. The corresponding triphosphates of several active compounds were prepared and tested as inhibitors of DNA synthesis catalyzed by herpes simplex virus
发现了一类新型的单纯疱疹病毒复制抑制剂。研究中的化合物衍生自缩合的1,2,4-三唑并[5,1- c ] [1,2,4]三嗪和1,2,4-三唑并[1,5- a ]嘧啶,它们的结构类似物天然核酸碱基。研究了该化合物的抗疱疹活性和细胞毒性。制备了几种活性化合物的相应三磷酸酯,并作为单纯疱疹病毒聚合酶催化的DNA合成抑制剂进行了测试。它们作用的潜在机制是阻断DNA依赖性DNA聚合酶,这是病毒复制的关键酶。
Factors Governing and Application of the Cope Rearrangement of 3,3-Dicyano-1,5-dienes and Related Studies
作者:Ehsan Fereyduni、Alexander J. Grenning
DOI:10.1021/acs.orglett.7b01951
日期:2017.8.4
Cope and co-workers reported the [3,3] rearrangement of 3,3-dicyano-1,5-dienes in the early 1940s (“The Coperearrangement”). However, these original substrates have remained largely unstudied until recently. Herein we explore styrene-deconjugating Coperearrangements, a diastereoselective Coperearrangement/deconjugative α-allylation sequence, and factors governing α- vs γ-allylation regioselectivity
Cope和他的同事报告了1940年代初期3,3-二氰基-1,5-二烯的[3,3]重排(“ The Cope重排”)。然而,直到最近,这些原始基板仍未得到研究。在本文中,我们探索了苯乙烯-去共轭Cope重排,非对映选择性Cope重排/去共轭α-烯丙基化序列,以及控制Knoevenagel加成烯丙基阴离子的α-与γ-烯丙基化区域选择性的因素。最终,这些研究使用简单的化学方法,从大量试剂中合成出了多种功能密集的聚环烷烃骨架。
A New and Efficient One-Pot Preparation of Alkyl Halides From Alcohols
作者:Francisco Camps、Vicens Gasol、Angel Guerrero
DOI:10.1055/s-1987-27988
日期:——
Primary alkanols and 2-alkenols are converted into the corresponding halides in high yield by a one-pot, two-step reaction via transformation into intermediate trifluoroacetates followed by nucleophilic substitution with lithium halides.
Aromatic Allylation via Diazotization: Variation of the Allylic Moiety and a Short Route to a Benzazepine Derivative
作者:Fredrik Ek、Lars-Göran Wistrand、Torbjörn Frejd
DOI:10.1021/jo026784b
日期:2003.3.1
A continued study of the recently discovered diazotizative allylation (DiazAll) reaction of aniline derivatives is reported. Several allyl reagents, commonly used in radicalallylationreactions, were evaluated, and some of these reagents resulted in allylation when used in the DiazAll reaction. The best result was obtained with allyl bromide. Substituted allylic bromides gave the corresponding allyl