53692-73-2

Basic information

• Product Name: Cyclopropanecarboxylic acid, 2,2-diphenyl-, (S)-
• CAS NO: 53692-73-2
• Molecular Formula: C16H14O2
• Molecular Weight: 238.286
• Mol File: 53692-73-2.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: Cyclopropanecarboxylic acid, 2,2-diphenyl-, (S)-(CAS DataBase Reference)
• NIST Chemistry Reference: Cyclopropanecarboxylic acid, 2,2-diphenyl-, (S)-(53692-73-2)
• EPA Substance Registry System: Cyclopropanecarboxylic acid, 2,2-diphenyl-, (S)-(53692-73-2)

Safety Data

• Hazardous Substances Data: 53692-73-2(Hazardous Substances Data)

Upstream product

• 908093-98-1 diazodiphenylmethane 
• 1333307-70-2 C₁₆H₁₄O₂*C₂₃H₂₆N₂O₄ 
• 19179-60-3 methyl 2,2-diphenylcyclopropane-1-carboxylate 
• 530-48-3 1,1-Diphenylethylene 
• 67428-04-0 ethyl (1S)-2,2-diphenylcyclopropylcarboxylate 
• 7150-12-1 2,2-diphenyl-cyclopropanecarboxylic acid 

Downstream Products

• 67428-04-0 ethyl (1S)-2,2-diphenylcyclopropylcarboxylate 
• 1333307-70-2 C₁₆H₁₄O₂*C₂₃H₂₆N₂O₄ 
• 51154-93-9 (S)-2,2-diphenyl-cyclopropanecarbonitrile 

Relevant articles and documents

1-[(E)-2-arylethenyl]-2,2-diphenylcyclopropanes: Kinetics and mechanism of rearrangement to cyclopentenes

Kinetic measurements for the thermal rearrangement of 2,2-diphenyl-1-[(E)- styryl]cyclopropane (22a) to 3,4,4-triphenylcyclopent-1-ene (23a) in decalin furnished ΔHρm{{-{isom}^{ne }}}$=31.0±1.2kcal mol-1 and ΔSρm{{-{isom}^{ne }}}$=-6. 0±2.6e.u. The lowering of ΔHa‰ by 20kcal mol-1, compared with the rearrangement of the vinylcyclopropane parent, is ascribed to the stabilization of a transition structure (TS) with allylic diradical character. The racemization of (+)-(S)-22a proceeds with ΔHρm{{-{rac}^{ne }}}$=28.2±0.8kcal mol -1 and ΔSρm{{-{rac}^{ne }}}$=-5±2e.u., and is at 150° 106 times faster than the rearrangement. Seven further 1-(2-arylethenyl)-2,2-diphenylcyclopropanes 22, (E)- and (Z)-isomers, were synthesized and characterized. The (E)-compounds showed only modest substituent influence in their krac (at 119.4°) and kisom (at 159.3°) values. The lack of solvent dependence of rate opposes charge separation in the TS, but a linear relation of log krac with log p.r.f., i.e., partial rate factors of radical phenylations of ArH, agrees with a diradical TS. The ring-opening of the preponderant s-trans-conformation of 22 gives rise to the 1-exo-phenylallyl radical 26 that bears the diphenylethyl radical in 3-exo-position, and is responsible for racemization. The 1-exo-3-endo-substituted allylic diradical 27 arises from the minor s-gauche-conformation of 22 and is capable of closing the three- or the five-membered ring, 22 or 23, respectively. The discussion centers on the question whether the allylic diradical is an intermediate or merely a TS. Quantum-chemical calculations by Houk etal. (1997) for the parent vinylcyclopropane reveal the lack of an intermediate. Can the conjugation of the allylic diradical with three Ph groups carve the well of an intermediate? Copyright

2,2′-isopropylidenebis[(4R)-(1-adamantyl)-2-oxazoline] (Adam-Box). A new enantiopure C2-symmetrical ligand: Enantioselective cyclopropanations, Diels-Alder reactions, and allylic oxidations

The title bisoxazoline (Box) featuring two adamantane skeletons (Adam-Box) is a ligand of (R,R)-configuration, which combined with copper sources makes excellent catalysts for enantioselective cyclopropanations, Diels-Alder reactions, and allylic oxidations.