Novel Pyrazines from the Myxobacterium<i>Chondromyces crocatus</i>and Marine Bacteria
作者:Jeroen S. Dickschat、Hans Reichenbach、Irene Wagner-Döbler、Stefan Schulz
DOI:10.1002/ejoc.200500280
日期:2005.10
iron-catalysed coupling of chloropyrazines with Grignard reagents or condensation of azido ketones as key steps. The synthetic material allowed the identification of two previously unknown attractants of bacterial origin for the pineapple beetle Carpophilus humeralis, namely 3-methoxy-2-(1-methylpropyl)-5-(2-methylpropyl)pyrazine (17) and 3-methoxy-2,5-bis(1-methylpropyl)pyrazine (52). Several 2,5-dialkylpyrazines
Strapped calix[4]pyrrole as a lithium salts selective receptor through separated ion-pair binding
作者:Kyeong-Im Hong、Hyeongcheol Kim、Younghun Kim、Moon-Gun Choi、Woo-Dong Jang
DOI:10.1039/d0cc04809g
日期:——
A triazole-bearing strapped calix[4]pyrrole (1) was synthesized as a lithium salt selective ion pair receptor. 1H NMR spectral studies and X-ray crystallography showed that the capture of LiCl by 1 occurs via separated ion pair binding. Furthermore, lithium salts extracted by 1 could be solidified in the form of Li2CO3 through CO2 or K2CO3 treatment.
合成了带三唑的杯状杯[4]吡咯(1),作为锂盐选择性离子对受体。1 H NMR光谱研究和X射线晶体学表明,通过分离的离子对结合发生了1的LiCl捕获。此外,通过CO 2或K 2 CO 3处理,可以将1提取的锂盐固化为Li 2 CO 3的形式。
Synthesis of 2-substituted oxazoloquinazolinones
作者:Olga Bobiļeva、Einārs Loža
DOI:10.1007/s10593-018-2394-8
日期:2018.11
(Z)-2-(4-substituted benzylidene)-2,3-dihydro-5H-oxazolo[2,3-b]quinazolin-5-ones instead of the expected methyl 2-[5-(4-substituted benzyl)oxazol-2-yl]amino}benzoates. A one-pot procedure for the synthesis of 2-substituted 5H-oxazolo[2,3-b]quinazolin-5-ones from appropriate azidomethyl ketones and 2-isothiocyanatobenzoate was developed.
在三苯基膦存在下,在二恶烷中通过加热产生的三环(Z)-2-(4-取代的亚苄基)- ,使2-异硫氰酸氰基苯甲酸甲酯与1-叠氮基-3-(4-取代的苯基)丙-2-酮反应。 2,3-二氢-5 H-恶唑基[2,3 - b ]喹唑啉-5-酮代替预期的2-[5-(4-取代的苄基)恶唑-2-基]氨基}苯甲酸甲酯。开发了一锅法,由适当的叠氮基甲基酮和2-异硫氰酸根合苯甲酸合成2-取代的5 H-恶唑并[2,3 - b ]喹唑啉-5-酮。
Targeting the entrance channel of NNIBP: Discovery of diarylnicotinamide 1,4-disubstituted 1,2,3-triazoles as novel HIV-1 NNRTIs with high potency against wild-type and E138K mutant virus
作者:Ye Tian、Zhaoqiang Liu、Jinghan Liu、Boshi Huang、Dongwei Kang、Heng Zhang、Erik De Clercq、Dirk Daelemans、Christophe Pannecouque、Kuo-Hsiung Lee、Chin-Ho Chen、Peng Zhan、Xinyong Liu
DOI:10.1016/j.ejmech.2018.03.059
日期:2018.5
on the modifications of diarylpyrimidines as HIV-1non-nucleosidereversetranscriptaseinhibitors (NNRTI) and reported crystallography study, novel diarylnicotinamide derivatives were designed with a “triazole tail” occupying the entrance channel in the NNRTI binding pocket of the reversetranscriptase to afford additional interactions. The newly designed compounds were then synthesized and evaluated
Expedient Synthesis of Chiral 1,2- and 1,4-Diamines: Protecting Group Dependent Regioselectivity in Direct Organocatalytic Asymmetric Mannich Reactions
作者:Naidu S. Chowdari、Moballigh Ahmad、Klaus Albertshofer、Fujie Tanaka、Carlos F. Barbas
DOI:10.1021/ol060980d
日期:2006.6.1
[reaction: see text] OrganocatalyticasymmetricMannichreaction of protected amino ketones with imines in the presence of an L-proline-derived tetrazole catalyst afforded diamines with excellent yields and enantioselectivities of up to 99%. The amino ketone protecting group controlled the regioselectivity of the reaction providing access to chiral 1,2-diamines from azido ketones and 1,4-diamines from