Detail of "5057-99-8"

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CAS Number:
5057-99-8
Name:
1,2-Cyclopentanediol,(1R,2R)-rel-
Molecular Structure:
Formula:
C₅H₁₀O₂
Molecular Weight:
102.13
Synonyms:
1,2-Cyclopentanediol,trans- (8CI);(1R,2R)-rel-1,2-Cyclopentanediol;1,2-trans-Cyclopentanediol;NSC15389;trans-(?à)-1,2-Cyclopentanediol;trans-1,2-Cyclopentanediol;trans-1,2-Dihydroxycyclopentane;
EINECS:
225-757-6
Density:
1.235 g/cm³
Melting Point:
54-56 °C(lit.)
Boiling Point:
216.4 °C at 760 mmHg
Flash Point:
112.7 °C
Appearance:
off-white crystalline powder
Safety:
22-24/25 Details

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Participation reactions of an acylamino ester group: Participation reactions of an acylamino ester group. Julia, Marc; Pancrazi, Ange F; Mestdagh, Helene; Lallemand, Jean Y. (Lab. Chim., Ec. Norm. Super., Paris, Fr.). Tetrahedron Lett., (38), 3437-8 (French) 1976. CODEN: TELEAY. DOCUMENT TYPE: Journal CA Section: 34 (Synthesis of Amino Acids, Peptides, and Proteins) Section cross-reference(s): 22 The rate consts. for the solvolysis in aq. AcOH of the p-toluenesulfonates I (R = COCH2NHBz, Ac) (II and III, resp.) and IV were detd. First-order kinetics were obsd. for >80% reaction of IV, 60% reaction of III, and 40-5% reaction of II. The variation obsd. in IV and III agrees with the results obtained by S. Winstein et al. (1948); the result for II shows that the benzoylglycinoxy group does not assist in the solvolysis of the p-toluenesulfonate neighbor as well as does the acetoxy group in III and IV. The amide group does not participate and the rate-detg. step is the formation of the dioxolanylium cation V.Except for chemicals metioned above, 495-69-2 is also used. .