107148-83-4

Upstream product

• 76-83-5 trityl chloride 
• 124-63-0 methanesulfonyl chloride 
• 85550-19-2 (S)-1-triphenylmethoxypropan-2-ol 

Downstream Products

• 107148-85-6 (2S,3S)-2-(3,4-dimethoxyphenyl)-3-methylbutyrolactone 
• 107148-86-7 (2R,3S)-2-(3,4-dimethoxyphenyl)-3-methylbutyrolactone 
• 107148-95-8 (2R,3S)-2-(3,4,5-trimethoxyphenyl)-3-methylbutyrolactone 
• 107148-96-9 (2S,3S)-2-(3,4,5-trimethoxyphenyl)-3-methylbutyrolactone 
• 1022086-56-1 C₂₈H₂₅IO₂ 
• 210360-66-0 (R,R)-bis(1-methyl-2-triphenylmethyloxy)ethyl ether 

Relevant academic research and scientific papers

Self-assembling phenylpropyl ether dendronized helical polyphenylacetylenes

The first example of a self-assembling phenylpropyl ether based dendronized polymer has been reported and its preferred helical handedness has been determined. Dendronized polymer poly(10) and its nondendritic analogue poly(8) are high-cis-content polyphenylacetylenes (PPAs) prepared by using [Rh(nbd)Cl]2/NEt3 (nbd: 2,5-nor-bornadiene). Both polymers possess a Stereocenter in their side chain, which selects a preferred helical handedness.Based on negative exciton chirality observed in the CD spectra of poly(10), we have designated this molecule as a right-handed helical polymer, which persists over a wide temperature range. Poly(10) self-organizes into both ΦhiO and Φh lattices in bulk. The ΦhiO-to-Φh transition is associated with thermore-versible cis-cisoidal to cis-transoidal isomerization of the helical PPA, accompanied by a dramatic decrease in the column diameter and a decrease in the π-stacking correlation length along the column. A model for the right-handed helical dendronized PPA has been proposed wherein dendrons from adjacent column strata interdigitate to effectively fill space.

Improved Synthesis of (-)-(2R,6R)-2,6-Dimethylmorpholine

An improved procedure for obtaining the enantiomerically pure title amine is described, using a convergent synthesis, starting from the easily available (R)- and (S)-1,2-propanediols.