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Solid-phase Synthesis of [4.4] Spirocyclic Oximes
Published on: February 6, 2019
A novel chelatofore functionalized spiropyran of the 2-oxaindane series
Antony O Bulanov1, Igor N Shcherbakov, Yulia P Tupolova
1Chemistry Faculty, Southern Federal University, 7 Zorge Street, Rostov-on-Don 344090, Russian Federation.
Abstract:
A novel chelatofore functionalized spiropyran of the 2-oxaindane series, namely 8-formyl-7-hydroxy-3',3'-dimethylspiro[2H-chromene-2,1'(3'H)-2-benzofuran], C(19)H(16)O(4), is reported. In the crystalline state, dimers are formed as a result of the pi-pi stacking of aromatic groups of the 2H-chromene part of the molecule and C-H...O interactions. The C(spiro)-O bond length in the pyran ring is 1.4558 (10) A, which is longer than or equal to the bond length in thermo- and photochromic 2-oxaindane spiropyrans synthesized previously, except for the 7,8-benzo/6-NO(2) derivative, in which this bond length is 1.465 (2) A.
