23242-84-4Relevant academic research and scientific papers
INDOLONAPHTHOPYRANS
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Paragraph 0097, (2020/07/14)
Provided is a photochromic indolenaphthopyran compound having the skeletal structure of Formula (I): wherein R1 and R2 each independently have a steric bulk A, wherein at least one of R1 or R2 has a steric bulk A of at least 0.6, R3 and R4 each independently have a Hammett σρ value, and wherein the indolenaphthopyran compound has a calculated electronic steric factor of at least -3.3.
METHOD FOR PREPARING INDOLENAPHTHOPYRANS
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Paragraph 0079; 0078, (2020/07/14)
Provided is a synthetic intermediate for the preparation of photochromic indolenaphthopyran compounds having the core skeletal structure of Formula (I): wherein m is 0 to 4, n is 0 to 4, R1 and R2 are each independently hydroxyl, cyano, (meth)acrylate, amino, halo, substituted or unsubstituted alkyl, boronic ester, boronic acid, polyether, polyester, polycarbonate, polyurethane, substituted or unsubstituted aryl, substituted or unsubstituted heterocycloaryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkoxy, substituted or unsubstituted aryloxy, substituted or unsubstituted alkylthio, substituted or unsubstituted arylthio, ketone, aldehyde, ester, carboxylic acid, carboxylate, amide, carbonate, carbamate, urea, siloxane, alkoxysilane, or polysiloxane; R3 is substituted or unsubstituted 2-pyridyl or substituted or unsubstituted 2-quinolyl; and R4 is hydrogen, substituted or unsubstituted alkyl, alkoxymethyl, substituted or unsubstituted silyl, or acyl. Also provided is a process for producing an indolenaphthol compound which includes cyclizing the phenylnaphthol compound of Formula (I) in the presence of a catalyst.
NOVEL PHOTOCHROMIC INDENO-FUSED NAPHTHOPYRANS
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Page 12, (2008/06/13)
Described are novel photochromic indeno-fused naphthopyran compounds, examples of which are naphthopyran compounds having a substituted or unsubstituted indeno group, the 2,1 positions of which are fused to the f side of the naphtho portion of the naphtho
Photochromic fulgides: Part 3 - Synthesis and some photochemical reactions of diphenylmethylene substituted methylenesuccinic anhydrides
Asiri, Abdullah Mohamed,Al-Juaid, Salih Salem
, p. 488 - 490 (2007/10/03)
The pale yellow crystals of fulgides 5a, 5b, 5c, 5d and 5e in crystalline state and in solutions, change to red on irradiation at 366nm, this change is reversed on exposure to white light. The substituents on the methylene group have a remarkable effect on the absorption maxima of both the coloured and uncoloured forms.
Photochromic substituted naphthopyrans
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, (2008/06/13)
Described are novel reversible photochromic 2H-naphtho[1,2-b]pyran compounds, examples of which are compounds having certain substituents at the number 5 carbon atom of the naphtho portion of the naphthopyran and at the 2-position of the pyran ring. Certain substituents may also be present at the number 6, 7, 8, 9 or 10 carbon atoms of the naphtho portion of the naphthopyran. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., spiro(indoline) type compounds, are also described.
Substituted naphthopyrans
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, (2008/06/13)
Described are novel reversible photochromic 2H-naphtho[1,2-b]pyran compounds, examples of which are compounds having certain substituents at the number 5 carbon atom of the naphtho portion of the naphthopyran and at the 2-position of the pyran ring. Certain substituents may also be present at the number 6, 7, 8, 9 or 10 carbon atoms of the naphtho portion of the naphthopyran. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., spiro(indoline) type compounds, are also described.
Stereochemistry of Cyclohexylidene(arylidene)succinates Formed in the Stobbe Condensation
Banerjee , S.,Bagavant, G.
, p. 362 - 365 (2007/10/02)
The diacids obtained from acid-esters 1-cyclohexylidene-2-carbomethoxy-3-arylprop-2-ene-1-carboxylic acids (5a) and 1-cyclohexylidene-1-carbomethoxy-3-arylprop-2-ene-2-carboxylic acids (5b) are identical.This along with the physico-chemical studies clearl
