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Autor:
Toshiro Imai, Shinya Nishida
Publikováno v:
Synthesis. 1993:395-399
Barbier-type allylation of aldehydes with allylic bromides and tin(II) chloride dihydrate is largely accelerated by adding stoichiometric or substoichiometric amounts of sodium iodide. This method has some merits such as lower temperature, shorter re
Publikováno v:
Synthesis. 1993:133-136
Alkyl 2-aminoethyl hydrogen phosphates (phosphatidyl ethanolamines) were prepared via phosphoramidite chemistry. tert-butoxy-carbonyl N-protection of 2-aminoethanol, followed by cyclisation with phosphorus(III) chloride gave the phosphoramidite 3-ter
Publikováno v:
Synthesis. 1992:391-394
Mthyl (E)-4-chloro-3-methoxy-2-butenoate (3a) is inexpensively prepared from methyl 4-chloroacetoacetate using thionyl chloride and methanol on an industrial scale. Many nucleophilic substitution reactions of chloride, which are impossible with the u
Publikováno v:
Synthesis. 1994:155-157
Trichloronitromethane adds to aldehydes in the presence of tin(II) chloride to yield dichloronitro alcohols via a Reformatsky-type reaction. Aliphatic aldehydes give higher yields than aromatic aldehydes
Autor:
Ursula Biermann, Jürgen O. Metzger
Publikováno v:
Synthesis. 1992:463-465
Dimethylaluminum chloride and ethylaluminum sesquichloride catalyze the ene reactions of formaldehyde with the C,C-double bond of unsaturated carboxylic acids, for example oleic acid and 10-undecenoic acid, and of the respective alcohols. Ethylalumin
Autor:
Akito Yasuhara, Futoshi Shiga, D. Uchiyama, Hiroshi Yamanaka, Yoshinori Kondo, Takao Sakamoto
Publikováno v:
Synthesis. 1992:746-748
The palladium-catalyzed cross-coupling reaction of aryl iodides with 3,3,3-triethoxy-1-propyne gave 1-aryl-3,3,3-triethoxy-1-propynes which were converted to the corresponding ethyl arylpropiolates. The arylpropiolates were also synthesized from the
Publikováno v:
Synlett. 1992:747-748
Autor:
B. D. Wilson
Publikováno v:
Synthesis. 1992:283-284
The Friedel-Crafts condensation of acetyl chloride and vinylidene chloride (1,1-dichloroethylene) in dichloromethane solution gives 4,4,4-trichloro-2-butanone (2), which is smoothly dehydrohalogenated with triethylamine to produce 4,4-dichloro-3-bute
Autor:
Juan Cabré, Antonio Luis Palomo
Publikováno v:
Synthesis. 1984:413-417
Publikováno v:
Synthesis. 1988:281-283
The cinnamoyl- (1a-j) and (5-phenyl-2,4-pentadienoyl)- (1k) ketene dithioacetals are shown to undergo methanolysis in the presence of ether-boron trifluoride complex and mercury(II) chloride to the corresponding methyl 5-aryl-3-oxo-4-pentenoates 2a-j