70330-57-3

Upstream product

• 66620-32-4 3-nitro-5-chloromethyl-2-hydroxybenzaldehyde 
• 603-35-0 triphenylphosphine 
• 90-02-8 salicylaldehyde 
• 23731-06-8 5-(chloromethyl)salicylaldehyde 

Downstream Products

• 70311-01-2 (1',3'-dimethyl-8-nitro-3'-phenyl-1',3'-dihydro-spiro[chromene-2,2'-indol]-6-ylmethyl)-triphenyl-phosphonium; chloride 
• 160517-14-6 C₁₅H₁₀BrNO₄ 
• 212840-05-6 C₁₆H₁₀N₂O₄ 
• 160517-15-7 C₁₆H₁₃NO₅ 
• 70310-93-9 2-hydroxy-3-nitro-5-styryl-benzaldehyde 
• 160517-13-5 C₁₅H₁₀ClNO₄ 
• 160517-16-8 C₁₅H₁₀N₂O₆ 
• 70310-97-3 1',3',3'-trimethyl-8-nitro-6-styryl-1',3'-dihydro-spiro[chromene-2,2'-indole] 

Relevant academic research and scientific papers

Synthesis of novel (p-substituted styryl) spirobenzopyrans

A series of (p-substituted styryl) spirobenzopyrans were synthesized by the Wittig reaction of Fisher's bases with 5-(p-substituted styryl) salicylaldehyde derivatives. The final spirobenzopyrans were characterized by the 1H NMR, IR, UV, and GC-MS analyses. Copyright Taylor & Francis Group, LLC.