714962-23-9

Upstream product

• 184110-36-9 (2S,1'R/S)-2-(1'-Ethoxyethoxy)propanal 
• 150-76-5 4-methoxy-phenol 
• 714962-22-8 2-[(1S,2S)-2-(1-Ethoxy-ethoxy)-1-hydroxy-propyl]-4-methoxy-phenol 

Downstream Products

• 714962-24-0 Toluene-4-sulfonic acid 2-((4S,5S)-2,5-dimethyl-[1,3]dioxolan-4-yl)-4-methoxy-phenyl ester 
• 714962-25-1 Toluene-4-sulfonic acid (1R,3S,4S)-4-hydroxy-8-methoxy-1,3-dimethyl-isochroman-5-yl ester 
• 714962-26-2 Toluene-4-sulfonic acid (1S,3S,4S)-4-hydroxy-8-methoxy-1,3-dimethyl-isochroman-5-yl ester 

Relevant academic research and scientific papers

Short, convergent, stereoselective syntheses of enantiopure 2-benzopyran-5,8-quinones related to the aphid insect pigments, the protoaphins

The enantiopure (1S,3S,4R)-, (1R,3S,4S)- and (1S,3S,4S)-3,4-dihydro-1,3- dimethyl-4-hydroxy-2-benzopyrans 16, 25 and 26 are prepared in two related reaction sequences, each in eight steps and good overall yield. The starting materials are 4-methoxyphenol

The diastereoselective syntheses of enantiopure benzo- and naphtho-pyrans related to the aphid insect pigments

An overview is presented of synthetic endeavours directed towards the assembly of the enantiopure quinone A and quinone A′, natural derivatives of the aphid insect pigments protoaphin-fb and protoaphin-sl. These are achieved through intramolecular diaster