70310-98-4

Upstream product

• 118-12-7 1,3,3-Trimethyl-2-methyleneindoline 
• 70310-94-0 2-hydroxy-5-[(E)-phenyldiazenyl]benzaldehyde 
• 100-52-7 benzaldehyde 
• 70311-00-1 triphenyl-(1',3',3'-trimethyl-1',3'-dihydro-spiro[chromene-2,2'-indol]-6-ylmethyl)-phosphonium; chloride 
• 1100-88-5 benzyltriphenylphosphonium chloride 
• 20200-69-5 6-formyl-1',3',3'-trimethylspiro<2H-1-benzopyran-2,2'-<1H>-indole> 
• 100-42-5 styrene 
• 227103-30-2 6-iodo-1',3',3'-trimethylspiro<2H-benzopyran-2,2'-indoline> 
• 68860-35-5 (3‐formyl‐4‐hydroxybenzyl)triphenylphosphonium chloride 
• 23731-06-8 5-(chloromethyl)salicylaldehyde 
• 3328-70-9 5-formyl-2-hydroxybenzaldehyde 

Relevant academic research and scientific papers

Synthesis of conjugated spiropyran dyes via palladium-catalyzed coupling reaction

Spiropyrans (5a-h) conjugated at 6 position have been conveniently and efficiently prepared by palladium-catalyzed coupling of 6-iodospiropyran (4a, 4b) with olefins or alkynes in moderate to high yield. This method might be a particularly very important

Synthesis of photochromic spiroindolinopyrans with extended conjugation

Unsaturated side chains have been introduced in benzopyran site of parent indolinospiropyran moiety using Wittig reaction under conditions of Phase Transfer Catalysis in a one pot synthesis. The resultant unsaturated photochromic indolinospirobenzopyrans show significant bathochromic shift in the uv region of absorption spectra.