Microwave-promoted synthesis of highly luminescent s-tetrazine-1,3,4-oxadiazole and s-tetrazine-1,3,4-thiadiazole hybrids
摘要:
Two series of new s-tetrazine derivatives containing 1,3,4-oxadiazole and 1,3,4-thiadiazole rings were synthesized from s-tetrazine-3,6-dicarbohydrazide, triethyl orthoesters and aroyl chlorides. Cyclocondensation reactions for both groups of conjugated arrangements proceeded rapidly and efficiently under microwave irradiation. The obtained compounds exhibited luminescence properties and large quantum yield of emitted photons.
Boron Trifluoride-Mediated Cycloaddition of 3-Bromotetrazine and Silyl Enol Ethers: Synthesis of 3-Bromo-pyridazines
作者:Simon D. Schnell、Jorge A. González、Jan Sklyaruk、Anthony Linden、Karl Gademann
DOI:10.1021/acs.joc.1c01384
日期:2021.9.3
regiocontrol remains difficult. We achieved the Lewis acid-mediated inverse electron demand Diels–Alder reaction between 3-monosubstituted s-tetrazine and silylenolethers and obtained functionalized pyridazines. In the case of 1-monosubstituted silylenolethers, exclusive regioselectivity was observed. Downstream functionalization of the resulting 3-bromo-pyridazines was demonstrated utilizing several cross-coupling
Processes For The Preparation Of Anti-Viral Compounds And Compositions Containing Them
申请人:Leivers Martin Robert
公开号:US20100029655A1
公开(公告)日:2010-02-04
Disclosed are processes for the preparation of compounds of formula I and compositions that comprise said compounds of formula I.
Also disclosed are processes for the preparation of compounds of formula III and compositions that comprise said compounds of formula III.
Functionalized pyridazine derivatives having a low molecular weight and pharmaceutical compositions thereof are useful as alpha-helix mimetics and for treating conditions and/or disorders mediated by alpha-helix-binding receptors and proteins.
A new and general method to functionalize the C(sp3)–C(sp2) bond of alkyl and alkene linkages has been developed, leading to the dealkenylative generation of carbon-centered radicals that can be intercepted to undergo Ni-catalyzed C(sp3)–C(sp2) cross-coupling. This one-pot protocol leverages the easily procured alkene feedstocks for organic synthesis with excellent functional group compatibility without
The nature of lithium perchlorate and gallium chloride salt effect in cycloaddition reactions
作者:Yury G. Shtyrlin、Dmitry G. Murzin、Natalia A. Luzanova、Gulnara G. Iskhakova、Vladimir D. Kiselev、Alexandr I. Konovalov
DOI:10.1016/s0040-4020(98)00025-8
日期:1998.3
acceleration effect of cycloadditionreactions in the presence of such Lewis acids as aluminum, gallium or boron halides is due to the sharp increase of π-acceptor properties of dienophiles and therefore increasing energy of orbital interaction, whereas LPDE medium demonstrates strong stabilization of static and/or dynamic polar forms and favors reactions with chargecontrol.