Results 71 to 80 of about 2,990 (181)

Auxin activity of 3-hydroxymethyl oxindole and 3-methylene oxindole in oat

Biologia Plantarum, 1986
Two photooxidation products of indol-3-ylacetic acid (IAA), 3-hydroxymethyl oxindole (HMO) and 3-methylene oxindole (Meox) were almost as effective as IAA in stimulation of growth of oat (Avena saliva cv. Kent) coleoptile sections. The IAA failed to give stimulation of growth after pretreatment of the coleoptiles with chemicals inhibiting oxidation of ...
R. N. Bhattacharyya, K. K. Chattopadhyay, P. S. Basu   +2 more
openaire   +1 more source

Asymmetric α-amination of 3-substituted oxindoles using chiral bifunctional phosphine catalysts

Beilstein Journal of Organic Chemistry, 2016
A highly enantioselective α-amination of 3-substituted oxindoles with azodicarboxylates catalyzed by amino acids-derived chiral phosphine catalysts is reported. The corresponding products containing a tetrasubstituted carbon center attached to a nitrogen
Qiao-Wen Jin, Zhuo Chai, You-Ming Huang, Gang Zou, Gang Zhao   +4 more
doaj   +1 more source

Organocatalytic asymmetric Michael addition of unprotected 3-substituted oxindoles to 1,4-naphthoquinone

Beilstein Journal of Organic Chemistry, 2012
We reported the first example of organocatalytic Michael addition of unprotected 3-prochiral oxindoles 1 to 1,4-naphthoquinone. Quinidine derivative (DHQD)2PYR was found to be able to catalyze this reaction in up to 83% ee, with moderate to excellent ...
Jin-Sheng Yu, Feng Zhou, Yun-Lin Liu, Jian Zhou   +3 more
doaj   +1 more source

Domino Reactions Enable Zn-Mediated Direct Synthesis of Spiro-Fused 2-Oxindole-α-Methylene-γ-Butyrolactones/Lactams from Isatin Derivatives and 2-(Bromomethyl)acrylates

Molecules
Isatin-derived spirocyclic cores are found in several biologically active molecules. Here, we report nucleophilic domino reactions for the synthesis of α-methylene-γ-butyrolactone/lactam containing spirocyclic oxindoles. The Zn-mediated one-step reaction
Prathap Reddy Mukthapuram, Amarnath Natarajan   +1 more
doaj   +1 more source

Oxindoles. V. Selective Solvolysis Reactions of Oxindole-Spirodimer

YAKUGAKU ZASSHI, 1985
YOSHIKAZU KONDO, YOJI MITADERA, SHIGEO NOZOE   +2 more
openaire   +2 more sources

Diazo-Preserving Radical Cascades for the Modular Photoinduced Synthesis of Oxindoles and Pyrazolones. [PDF]

Org Lett
Sarró P, Pleixats R, Vallribera A, Gimbert-Suriñach C, Granados A.   +4 more
europepmc   +1 more source

Organocatalytic Enantio- and Diastereoselective Synthesis of Dispirooxindole Derivatives with Adjacent Spirocyclic Centers via [4 + 2] Cycloadditions. [PDF]

J Org Chem
Hidalgo-León R, Trujillo-Sierra J, Sansano JM, Retamosa MG.   +3 more
europepmc   +1 more source

Thiophenol-mediated metal-free chemoselective conjugate reduction strategy for 3-alkylidene oxindoles. [PDF]

RSC Adv
Patil BR, Nichinde CB, Girase AS, Chaudhari SS, Kinage AK.   +4 more
europepmc   +1 more source

Controllable copper-catalysed photo-induced carbonylative cyclization to access dihydroquinolinones and oxindoles. [PDF]

Chem Sci
Zhao YH, Wang LC, Wu XF.
europepmc   +1 more source

The structural requirements of 3,5-substituted oxindoles that determine selective AMPK or GSK3β inhibition. [PDF]

RSC Med Chem
Strang JE, Astridge DD, Chandler C, Nguyen VT, Reigan P.   +4 more
europepmc   +1 more source