- Synthesis of Some Conjugated Caradienes from 3-Carene by the Wittig Reaction and Their Reactivity in the Diels-Alder Reaction
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The applicability of the Wittig reaction for the preparation of conjugated cis-caradienes was studied by the preparation of 4-methyl-3(10)-carene (27).The method was applied for the study of the synthesis of 3-vinyl-3-apocarene (6), 4-methylene-3(10)-carene (7), 4-methyl-2-methylene-3(10)-carene (8), 4-isopropenyl-3-carene (9) and 4-isopropenyl-3-caren-2a-ol (11) starting from 3-carene (20).The reactivity of conjugated cis-caradienes 6,7 and 9 in the Diels-Alder reaction has also been studied.
- Lajunen, Marja
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- PCC oxidation of organoboranes obtained using acetoxyborohydride
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The selective hydroboration with acetoxyborohydride of dienes and functionalized olefins followed by PCC oxidation afford the corresponding carbonyl derivatives.
- Dhillon, Ranjit S.,Kaur, Avinder Pal,Kaur, Gurpreet
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p. 453 - 454
(2007/10/03)
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- Selective oxidation of primary alcohols with quinolinium chlorochromate
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Selective oxidation of primary alcohol in the presence of a secondary alcohol with quinolinium chlorochromate (QCC) has been achieved with a mild, stable and very efficient reagent. Its mechanistic and comparative study with isoquinolinium chlorochromate (IQCC) has also been reported.
- Singh, Jasvinder,Kad, G. L.,Vig, Shikha,Sharma, Munisha,Chhabra, B. R.
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p. 272 - 274
(2007/10/03)
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- Transformations of 3-carene oxide at rhenium-containing catalysts
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The transformations of 3-carene oxide at rhenium-containing catalysts were studied.The introduction of rhenium into the catalytic system significantly increases the reaction rate and leads to the formation of compounds not previously encountered in the products from the isomerization of 3-carene oxide, i.e., 3-carene, 3(10),4-caradiene, 3,3,6-trimethylcycloheptanone, and 3-caren-10-ol.
- Manukov, E. N.,Bazhina, G. N.
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p. 106 - 110
(2007/10/02)
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- LIGHT-MEDIATED TRANSFORMATIONS OF OLEFINS INTO ALCOHOLS: REACTIONS OF HYDROXYL RADICALS WITH CYCLOALKENES
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Reactions of hydroxyl radicals, generated by photodecomposition of hydrogen peroxide in acetonitrile, with a wide variety of cycloalkenes have been examined.The results show that the major reaction is the addition of hydroxyl radicals to the less substituted end of the double bond, furnishing the secondary alcohols.The reactivity pattern and the observed regio- and stereoselectivity clearly reveal that the steric parameters associated with the substrates play a dominant role in directing the addition reactions.More importantly, this study led to the development of a new methodology for the facile conversions of olefins essentially into secondary alcohols, and includes a few examples which demonstrate the potential of the method.
- Sonawane, H. R.,Nanjundiah, B. S.,Kelkar, R. G.
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p. 6673 - 6682
(2007/10/02)
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- STEREOCHEMICAL CONTROL ON THE PHOTOCHEMISTRY OF α-METHOXY-β,γ-CYCLOPROPYL CYCLIC KETONES : REACTIONS OF EPIMERIC 3-METHOXY-4-CARANONES
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The two distinct photoreactions exhibited by epimeric ketones have been correlated with their stereochemistry.
- Sonawene, H. R.,Nanjundiah, B. S.,Purohit, P. C.
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p. 3917 - 3918
(2007/10/02)
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