782-03-6

Upstream product

• 21900-34-5 3-bromo-4-chlorobenzoyl chloride 
• 71-43-2 benzene 
• 42860-10-6 3-bromo-4-chlorobenzoic acid 
• 2840-28-0 3-amino-4-chloro-benzoic acid 

Downstream Products

• 834895-52-2 3-bromo-4-pyrrolidinobenzophenone 
• 834895-43-1 3-(3-bromo-4-pyrrolidinophenyl)-3-phenyl-3H-naphtho[2,1-b]pyran 
• 834895-57-7 1-(3-bromo-4-pyrrolidinophenyl)-1-phenylprop-2-yn-1-ol 

Relevant academic research and scientific papers

Synthesis and photochromic properties of substituted 3H-naphtho[2,1-b] pyrans

The synthesis and spectroscopic properties of novel 3H-naphtho[2,1-b]pyrans are described. Subtle variation of the colour of the photo-generated merocyanine dyes derived from these naphthopyrans can be accomplished by controlling the steric interactions between a terminal pyrrolidine donor group and a proximal substituent.