17502-34-0Relevant articles and documents
Ammonium-directed dihydroxylation of 3-aminocyclohex-1-enes: Development of a metal-free dihydroxylation protocol
Aciro, Caroline,Claridge, Timothy D. W.,Davies, Stephen G.,Roberts, Paul M.,Russell, Angela J.,Thomson, James E.
supporting information; experimental part, p. 3751 - 3761 (2009/02/04)
Treatment of 3-aminocyclohex-1-enes with mCPBA in the presence of trichloroacetic acid gives the corresponding 1,2-anti-2,3-syn-1- trichloroacetoxy-2-hydroxy-3-aminocyclohexane with high levels of diastereoselectivity (90% de). This is consistent with a mechanism of oxidation involving hydrogen-bonded delivery of the oxidant by the allylic ammonium ion formed in situ, followed by highly regioselective ring-opening of the intermediate epoxide by trichloroacetic acid. The effect of conformational constraints upon the oxidation reaction is also examined. The Royal Society of Chemistry 2008.
Mechanism of chorismate mutase: Contribution of conformational restriction to catalysis in the Claisen rearrangement
Khanjin, Nikolai A.,Snyder, James P.,Menger
, p. 11831 - 11846 (2007/10/03)
The mechanism of the enzyme- and antibody-catalyzed Claisen rearrangement of chorismate to prephenate was investigated experimentally on model compounds and by using quantum chemistry calculations at the Becke3LYP/6-31G* level of theory. Conformational re
Mitsunobu Reaction of Unbiased Cyclic Allylic Alcohols
Shull, Brian K.,Sakai, Takashi,Nichols, Jeffrey B.,Koreeda, Masato
, p. 8294 - 8303 (2007/10/03)
The stereochemical inversion of unbiased allylic alcohols using triphenylphosphine, diethyl azodicarboxylate, and benzoic acid, commonly known as the Mitsunobu reaction, was studied in three different solvents with specific attention toward the product composition. The results generated for the Mitsunobu reaction of (R)-3-deuterio-2-cyclohexen-1-ol and the cis and trans isomers of 1-deuterio-5-methyl-2-cyclohexen-1-ol, 1-deuterio-5-tert-butyl-2-cyclohexen-1-ol, and optically active cis and trans 5-isopropyl-2-methyl-2-cyclohexen-1-ol all gave similar product distributions with respect to inversion and retention at the carbinol center as well-as syn and anti Sn2′ type addition when THF or benzene was used as the solvent (CH2Cl2 gave less selective product distributions). Interestingly, it was found that the quasi-equatorial and quasi-axial nature of the starting allylic alcohol does not appear to affect the product distribution for this reaction, nor does methyl substitution at the central carbon of the allylic alcohol. In all cases, significant amounts (8-28%) of non-SN2 type products were detected for these sterically unbiased allylic alcohols; only 72-77% of the product was from SN2 type reaction when sterically undemanding (R)-S-deuterio-2-cyclohexen-1-ol was subjected to Mitsunobu conditions.
On the dihydroxylation of cyclic allylic alcohols
Donohoe, Timothy J.,Garg, Rina,Moore, Peter R.
, p. 3407 - 3410 (2007/10/03)
The preparation and dihydroxylation (OsO4) of a series of conformationally constrained allylic alcohols is described. By using dichloromethane as solvent, the selectivity that favours the anti triol is substantially reduced by hydrogen-bonding
Reactions of Cyclohexenyl Halides with Tributylstannane. Stereoelectronic Effects on SH2 Reactions at Halogen
Beckwith, Athelstan L. J.,Westwood, Steven W.
, p. 2123 - 2132 (2007/10/02)
Allylic halogenation of t-butylcyclohexene (2a) with t-butyl hypochlorite or N-bromosuccinimide affords mixtures containing mainly trans-5-t-butyl-3-chlorocyclohexene (2b) and the corresponding trans bromo compound (2c) respectively.The copper-catalysed r
