نتایج جستجو برای: spiro oxindole
تعداد نتایج: 2554 فیلتر نتایج به سال:
In the title compound, C(22)H(17)NO(5)S(2), the dithiole and oxindole rings are almost coplanar [dihedral angle = 2.71 (8)°] and the phenyl ring makes a dihedral angle of 73.65 (5)° with the oxindole ring. Inter-molecular π-π contacts between adjacent oxindole and dithiole rings [centroid-centroid distance = 3.7273 (11) Å] stabilize the crystal packing.
Recently, Moore and co-workers reported the isolation and structural elucidation of several oxindole-containing natural products from blue-green algae. Termed the welwitindolinones, this structurally intriguing class of alkaloids displays diverse and valuable biological properties, including multiple drug resistance (MDR) reversing, insecticidal, and antifungal activities. To date, ten congener...
Wittig olefination-Claisen rearrangement protocol was applied to obtain 3-allyl oxindole. This oxindole was then converted to (±)-coerulescine and (±)-horsfiline.
Three-component cascade reactions of (E)-3-arylidene-1-methyl-pyrrolidine-2,5-diones, L-valine and various isatin derivatives are described. A series 17 spiropyrrolidine with wide structural complexity diversity have been thus obtained in moderate to excellent yields under mild reaction conditions. The structure stereochemistry these N-heterocyclic cycloadducts has established by spectroscopic ...
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