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Bis- synthesis

Silverman M and Werkman CH (1939) Adaptation of the propionic acid bacteria to vitamin Bi synthesis including method of assay. J Bacteriol 38 25-32 Siu PML and Wood HG (1962) Phosphoenolpyruvic carboxytransphosphorylase, a CO2 fixation enzyme from propionic acid bacteria. J Biol Chem 237 3044-3051 Sizova AV and Arkadjeva ZA (1968) Propionic acid bacteria of rumen and their capacity for vitamin B12 biosynthesis. Mikrobiol Sintez 10 8-13... [Pg.273]

A similar synthesis starts from commercially available 1,5-hexadiyne and 2-methyl-cyclopent-2-enone. The benzocyclobutene is obtained from a bis-acetylene in a cobalt-catalyzed reaction. It rearranges regio- and stereoselectively to a 3-deoxy steroid derivative. The overall yield from the cyclopentenone was 40% (R.L. Funk, 1977). [Pg.281]

J.M.J. Frechet (C. J. Hawker, 1990) replaced the divergent synthesis by a convergent growth of a dendritic polymer. The repeatedly employed monomer, 5-hydroxymethyl-l, 3-benzenediol, was 1,3-O-dibenzylatcd with 3,5-bis(benzyloxy)benzyl bromide. The resulting benzyl alcohol containing 7 benzene rings was converted to the benzyl bromide which was... [Pg.354]

In the synthesis of morphine, bis-cyclization of the octahydroisoqtiinolinc precursor 171 by the intramolecular Heck reaction proceeds using palladium trifluoroacetate and 1,2,2,6,6-pentamethylpiperidine (PMP). The insertion of the diene system forms the rr-allylpalladium intermediate 172, which attacks the phenol intramolecularly to form the benzofuran ring (see Section 1.1.1.3). Based on this method, elegant total syntheses of (-)- and (+ )-dihydrocodei-none and (-)- and ( + )-morphine (173) have been achieved[141]. [Pg.153]

Examples of different kinds of dyes obtained by usual synthesis starting from bis-thiazolium salts are listed in Tables 41A,BtC, 42, 43A.B-C, 44. [Pg.68]

Oligonucleotide synthesis involves specialized blocking and coupling reactions the chemistry of which is beyond the scope of a typical introductory course The in terested reader is referred to http //WWW bi umist ac uk/ users/dberrisford/1 MBL/ nucleicacidB html... [Pg.1164]

Ai,A/-bis(hydroxymethyl) formamide [6921-98-8] (21), which in solution is in equiUbrium with the monomethylol derivative [13052-19-2] and formaldehyde. With ben2aldehyde in the presence of pyridine, formamide condenses to yield ben2yhdene bisformamide [14328-12-2]. Similar reactions occur with ketones, which, however, requite more drastic reaction conditions. Formamide is a valuable reagent in the synthesis of heterocycHc compounds. Synthetic routes to various types of compounds like imida2oles, oxa2oles, pyrimidines, tria2ines, xanthines, and even complex purine alkaloids, eg, theophylline [58-55-9] theobromine [83-67-0], and caffeine [58-08-2], have been devised (22). [Pg.508]

A successful synthesis of novel, soluble aromatic Pis involving 3,4-bis-(4-aminophen5l)-2,5-diphen5lfuran by polymerization with aromatic tetracarboxyhc dianhydrides through the conventional two-step method has been reported (6) (Fig. I). [Pg.530]


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2,6-Bis cyanate synthesis

Alkali metal cyanides 2,2-bis carbonitrile synthesis

Alkenes, 1,2-bis synthesis via acyloin condensation

Amidinium salts 2,2-bis carbonitrile synthesis

Aminal esters 2,2-bis carbonitrile synthesis

Bingel Macrocyclization Synthesis of cis-2 Bis-adduct 42 Starting from Benzene-1,2-dimethanol (Scheme

Bis hydrazine synthesis

Bis imidazol-2-ylidene synthesis

Bis phosphinates synthesis

Bis phosphinic acids, synthesis

Bis tellurides, synthesis

Bis zirconium dichloride, synthesis

Bis-p-phenylene-34-crown-10 synthesis—a receptor for n-electron-deficient aromatics

Butadiene, 1,3-bis synthesis from 1,3-diketones

Butadiene, 2,3-bis synthesis from 2,3-butanedione

Carbonitriles, 2,2-bis alkane synthesis

Carbonitriles, 2,2-bis synthesis

Carbonitriles, 2,2-dihalo2,2-bis carbonitrile synthesis

Diols, bis synthesis

Furan, 2,5-bis reaction with carbonyl compounds synthesis

Iodine tetrafluoroborate, bis a-iodocarbonyl compound synthesis

Iodine tetrafluoroborate, bis a-iodocarbonyl compound synthesis from alkenes

Ortho esters 2,2-bis carbonitrile synthesis

Propionitrile, 2,2-bis synthesis

Pyridine, bis synthesis

Pyrrole, 2,5-bis synthesis

Pyrrole, 2,5-bis synthesis Mannich reaction

SYNTHESIS OF BI ARYLS

Sodium bis aluminum hydride allylic alcohol synthesis

Sulfides, bis synthesis

Sulfones, bis synthesis

Synthesis and Complexation of Ethene Bridged Bis(phosphine) Ligands

Synthesis of 1,2-Bis(silyl)-Alkenes

Synthesis of 3,3-Bis(Chloromethyl) Oxetane(BCMO)

Synthesis of Bi-and Tricyclic Aziridine Derivatives

Synthesis of Conductors and Superconductors Based on Metal Bis-Dithiolene Complexes

Synthesis of Ethyl 3,5-bis(bromomethyl)4- hydroxybenzoate

Synthesis of a bis(carceplex)

Synthesis of bis-tren

Synthesis of enones and cyclopropanes from bis(oxoalkyl (tellurium dichlorides

Tellurone, bis synthesis

Thiirane, 2,3-bis synthesis

Thiirane, 2,3-bis synthesis via thiocyanogen addition to alkene

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