Base-catalyzed decomposition of peroxypivalic acid in aqueous solution

The Electrophilic Nature of Carbenoids, Nitrenoids, and Oxenoids

“…The reaction is about 50 times faster if an equimolar amount of cumene hydroperoxide is present . Similarly, the rate of the 1 O 2 -formation from H 2 O 2 362 as well as from peracids 363 is fastest with equal amounts of “acid” and the corresponding metal salt. , These results could indicate that in the Ti(O t Bu) 4 -catalyzed formation of 1 O 2 from t BuOOH 343 the Ti-peroxide t BuOOTi(O t Bu) 3 366 , formed from t BuOOH 343 and Ti(O t Bu) 4 357 , transfers an oxygen atom onto t BuOOH 343 to give the trioxide 367 ; see Scheme , reactions 1 and 2.

95 Possible Mechanism for the Formation of 1 O 2 from 343 and 357

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“…Labeling studies suggest that one oxygen atom in 1 O 2 , formed from Caro's acid 369** and the salt 370 (as well as from other peracids RCO 3 H 363** and their salts 371 ), comes from the acid andone from the salt, respectively, to give 1 O−*O 358* . 219c,,219a,219d,

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Synthetic aspects of an asymmetric nitrogen-insertion process: preparation of chiral, non-racemic caprolactams and valerolactams. Total synthesis of (-)-alloyohimbane

“…Found: C,70.38;H,10.25; N, 9.47. (4a'S,acetyl]indole (26). A 25-mL two-necked round-bottom flask equipped with a gas inlet tube, a septum cap, and a magnetic stirbar was charged with sodium hydride (ca.…”

Total Synthesis of Cryptophycin A and Analogs

“…Peroxypivalic acid 42 was obtained by adding 50% hydrogen peroxide to a solution of peroxypivalic acid in sulfuric acid. 26 All of the epoxidations of ß-trans-methyl styrene were successful using in situ dioxiranes, 39, 40 and 41, and peroxypivalic acid (42).…”