108894-99-1Relevant articles and documents
Bis-phosphoric acid derived from BINOL dimer as a chiral br?nsted acid catalyst for enantioselective transformations
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A chiral bis-phosphoric acid derived from a BINOL (1,1¤-bi-2-naphthol) dimer as a chiral backbone was developed. The catalytic efficiency of this bis-phosphoric acid was compared with that of a reported bis-phosphoric acid having a single BINOL backbone i
A single phosphine ligand allows palladium-catalyzed intermolecular C-O bond formation with secondary and primary alcohols
Wu, Xiaoxing,Fors, Brett P.,Buchwald, Stephen L.
supporting information; experimental part, p. 9943 - 9947 (2011/12/05)
Forging a bond: An efficient, general palladium catalyst for C-O bond-forming reactions of secondary and primary alcohols with a range of aryl halides has been developed using the ligand 1. Heteroaryl halides, and for the first time, electron-rich aryl halides can be coupled with secondary alcohols. A diverse set of substrate combinations are possible with just a single ligand, thus obviating the need to survey multiple ligands. Copyright
Phospholes with reduced pyramidal character from steric crowding III NMR and X-ray diffraction studies on 1-( 2,4,6-tri-isopropylphenyl)-3-methylphosphole
Keglevich, Gyoergy,Quin, Louis D.,Boecskei, Zsolt,Keserue, Gyoergy M.,Kalgutkar, Rajdeep,Lahti, Paul M.
, p. 109 - 116 (2007/10/03)
The 2,4,6-tri-isopropylphenyl substituent was placed on the phosphorus of a phosphole to reduce the pyramidal character. That this was accomplished was revealed by single crystal X-ray diffraction analysis; with respect to the plane of C2-P-C5 in the phosphole ring, the ipso carbon of the benzene ring was deflected by only 58.0°, whereas the deflection is 66.9° in the uncrowded 1-benzylphosphole. This proves that the concept of reducing the pyramidal character (with the goal of increasing the electron delocalization) through steric crowding can be realized. In the crystal the two rings are in orthogonal planes, but this relation is not retained in solution; NMR studies show that the two edges of the benzene ring, as well as the 2,6-isopropyl groups, are identical.