Results 261 to 270 of about 29,358 (323)

ChemInform Abstract: CONDENSED ISOQUINOLINES. XI. IMIDAZO(5,1‐A)ISOQUINOLINES

Chemischer Informationsdienst, 1976
AbstractDas aus (I) zugängliche Carbonitril (II) wird katalytisch zu dem Amin (III) hydriert, dessen Acetylierung die Produkte (IV), (Va), (Vb) sowie das bekannte Imidazoisochinolin (Xd) gibt; demnach unterliegt (Vb) unter den vorhandenen Bedingungen bereits der Cyclokondensation zu (Xd).
Willy R. F. Lingier, Hans Reimlinger, Jan J. M. Vandewalle, Ernest De Ruiter   +3 more
openaire   +2 more sources

Palladium-Catalyzed Cascade Cyclization of Alkene-Tethered Aryl Halides with o-Bromobenzoic Acids: Access to Diverse Fused Indolo[2,1-a]isoquinolines.

Organic Letters, 2019
A novel palladium-catalyzed cascade cyclization of alkene-tethered aryl halides with o-bromobenzoic acids is described, which provides an efficient avenue for building various fused hexacyclic scaffolds containing indolo[2,1-a]isoquinoline in moderate to
Xiumei Yang, Haiyan Lu, Xiaoming Zhu, Liwei Zhou, Guobo Deng, Yuan-Liang Yang, Yun Liang   +6 more
semanticscholar   +1 more source

The Simple Isoquinolines

1978
The chemistry, synthesis, and biogenesis of peyote, Lophophora williamsii (Lemaire) Coult., and other cactus alkaloids have been thoroughly reviewed.1 ...
Maurice Shamma, Jerome L. Moniot
openaire   +2 more sources

Ru(II)-Catalyzed Regioselective Hydroxymethylation of β-Carbolines and Isoquinolines via C-H Functionalization: Probing the Mechanism by Online ESI-MS/MS Screening.

Journal of Organic Chemistry, 2019
A Ru(II)-catalyzed regioselective C-H activation toward hydroxymethylation of β-carbolines and isoquinolines as effective directing groups has been developed, and the mechanism was probed by using online electrospray ionization-tandem mass spectrometry ...
Ramya Tokala, Darshana Bora, Sravani Sana, F. M. Nachtigall, Leonardo S. Santos, N. Shankaraiah   +5 more
semanticscholar   +1 more source

Ruthenium(II)-Catalyzed Oxidative Double C-H Activation and Annulation Reaction: Synthesis of Indolo[2,1-a]isoquinolines.

Organic Letters, 2019
The first metal-catalyzed double aryl C(sp2)-H bond activation of antipyrine and alkyne annulation reaction is reported. This Ru(II)-catalyzed reaction was accomplished in the presence of 20 mol % phosphine ligand tricyclohexylphosphine tetrafluoroborate
Somadrita Borthakur, B. Sarma, S. Gogoi
semanticscholar   +1 more source

Rhodium(III)-Catalyzed Annulation of Acetophenone O-Acetyl Oximes with Allenoates through Arene C-H Activation: An Access to Isoquinolines.

Journal of Organic Chemistry, 2019
Rhodium(III)-catalyzed annulation of acetophenone O-acetyl oximes with allenoates was achieved, affording isoquinolines in good to excellent yields with high regioselectivities under redox-neutral conditions.
Quannan Wang, Jiang Lou, Zilong Huang, Zhengkun Yu   +3 more
semanticscholar   +1 more source

3,4-Dihydrobenz[f]isoquinoline and 3,4-dihydrobenz[g]isoquinoline

The Journal of Organic Chemistry, 1988
AbstractThe isoquinolines (II) and (IX) mentioned in the title are prepared by cyclization of the N‐naphthylethyl formamide (I) or by cyclocondensation of the diacid monoester (V) with urea (VI) and subsequent reduction and dehydrogenation.
Steven D. Young, Joel R. Huff, J. M. Wiggins   +2 more
openaire   +3 more sources

Cp*Co(iii)-catalyzed annulation of azines by C-H/N-N bond activation for the synthesis of isoquinolines.

Organic and biomolecular chemistry, 2019
Herein, an efficient, atom economic and external oxidant free approach has been disclosed for the synthesis of isoquinolines. Azines were employed for annulation reactions with alkynes via sequential C-H/N-N bond activation using an air-stable cobalt ...
Dewal S. Deshmukh, Prashant A. Yadav, B. Bhanage   +2 more
semanticscholar   +1 more source

Synthesis of quinolines and isoquinolines via site-selective, domino benzannulation of 2-and 3-chloropyridyl ynones with nitromethane.

Journal of Organic Chemistry, 2019
An approach of general applicability to diverse quinolines and isoquinolines via a tactic that utilizes the recursive anion from nitromethane as a 1C-connector to stitch easily and appropriately crafted pyridyl ynones through transition metal free ...
M. Beesu, G. Mehta
semanticscholar   +1 more source

Visible-Light Photoredox-Catalyzed Iminyl Radical Formation by N-H Cleavage with Hydrogen Release and Its Application in Synthesis of Isoquinolines.

Organic Letters, 2018
An unprecedented visible-light photoredox-catalyzed iminyl radical formation by N-H cleavage with H2 release has been developed. Its application in the synthesis of various isoquinolines and related polyaromatics in high atom economy at ambient ...
Wan‐Fa Tian, Dang-Po Wang, Shao-Feng Wang, Ke-Han He, Xiao-Ping Cao, Yang Li   +5 more
semanticscholar   +1 more source