- A novel stereoselective one-pot conversion of alcohols into alkyl halides mediated by N,N′-diisopropylcarbodiimide
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Alcohols can be converted in high yields to the corresponding alkyl halides in a one-pot procedure via the corresponding O-alkylisourea; very short reaction times are possible when microwave irradiation is used.
- Crosignani, Stefano,Nadal, Brice,Li, Zhengning,Linclau, Bruno
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p. 260 - 261
(2007/10/03)
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- Process for the preparation of α-bromo, ω-chloroalkanes
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Described is a process for easily preparing an α-bromo,ω-chloroalkane which is high in purity represented by the formula: Br(CH2)n Cl in which n stands for an integer of 4 to 12. The process comprises reacting in an organic solvent an α,ω-dichloroalkane with an αω-dibromoalkane. As the organic solvent, an aprotic nitrogen-containing or sulfur-containing organic solvent having a dielectric constant at 20° C. of 20 or larger, for example, N,N-dimethylformamide, N,N-dimethylacetamide or N,N-dimethylimidazolidinone is preferred.
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- A New and Efficient One-Pot Preparation of Alkyl Halides From Alcohols
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Primary alkanols and 2-alkenols are converted into the corresponding halides in high yield by a one-pot, two-step reaction via transformation into intermediate trifluoroacetates followed by nucleophilic substitution with lithium halides.
- Camps, Francisco,Gasol, Vicens,Guerrero, Angel
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p. 511 - 512
(2007/10/02)
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- 8,12-Dialkyl-PGE, and PGF1α
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Prostaglandins E1 -type and F1 -type compounds of the formula EQU1 wherein R is hydrogen or a hydrocarbyl group containing from 1 to 12 carbon atoms, inclusive, wherein W is EQU2 or O =, wherein R7, R8, R9, R10, R11, R12, R13, and R14 are hydrogen or alkyl of 1 to 4 carbon atoms, inclusive, provided (1) that at least one of R7, R8, R9, R10, R11, R12, R13, and R14 is alkyl (2) that when R13 is alkyl, at least one of R7, R8, R9, R10, R11, R12, and R14 is alkyl, and (3) that when R7 is alkyl or thwn R7 and R8 are alkyl, at least one of R9, R10, R11, R12, R13, and R14 is alkyl; and the enantiomers and racemic mixtures thereof. These are useful for the same pharmacological purposes as the unsubstituted prostaglandins.
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