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3- Oxazoline-5-ones

Thioacetyl derivatives (155) are obtained by direct heterocyclization reactions (365. 378, 563) and by a sulfur-oxygen exchange" reaction involving thioacetic acid and A-2-oxazoline-5-one (154) or A-2-thiazoline-5-one (156) (Scheme 81) (365, 378, 379). Ra-Ni reduction of 155 affords the 5-unsubstituted thiazole (379). [Pg.417]

A-2-Oxazoline-5-one (2091 when treated with thioacetic acid yields the corresponding thiazoline-5-one (210) (Scheme 107) (458. 461). These results have been questioned recently (365) however, it appears in the later report that a large excess of thioacetic acid was used instead o-f the stoichiometric amount previously used. [Pg.429]

Phenylmercunc chlonde, conversion to phenyltnchloromethylmercury by reaction with sodium tn-chloroacetate 46, 98 2 Phenyl 2 oxazolin-5 one, 47,... [Pg.135]

Polyamides containing a-aminoacid units are readily obtained by reaction of bisazlactones (2-oxazolin-5-ones) with diamines. When polyamines such as diethylenetriamine (DETA) or triethylenetetramine (TETA) are used as the diamine component, the resultant polyamides readily cyclodehydrate above 200°C to produce polymers containing 2-imidazolin-5-one units in the backbone. Polyamides derived from simple diamines (e.g. 1,6-hexanedi amine) cyclodehydrate only in the presence of a suitable catalyst. Carboxylate salts and certain Lewis acids have been found to be efficient catalysts for this transformation. [Pg.119]

Initial polymerization studies were conducted with 2,2 -tetramethylenebls(4,4-dimethyl-2-oxazolin-5-one) 4 and... [Pg.120]

Photoelimination of carbon dioxide from the 2-oxazolin-5-one 474 in the presence of methyl acrylate affords the cis- and frans-l-pyrrolines 475 and 476.394 A nitrile ylid is believed to be involved in this and other analogous transformations.395... [Pg.317]

C-Alkylation of 2-oxazolin-5-ones under catalysed mildly basic conditions provides a convenient route to a-branched a-amino acids (50-80%) [126]. Similarly, A-alkyloxindoles are mono- and di-alkylated at the 3-position [127], For other examples of the alkylation of heteroaryl systems, see Chapter 5. [Pg.255]

The 5-oxazolones or oxazolin-5-ones are very interesting heterocyclic compounds that have been used as intermediates in the synthesis of a variety of organic molecules. Two structural classes are possible, the 5(27T)-oxazolones (or 3-oxazo-lin-5-ones) and 5(47T)-oxazolones (or 2-oxazolin-5-ones). These structures differ only in the position of the double bond. Apart from the presence of the heteroatoms (N and O), the carbonyl group and the double bond, the 2- or 4-position, respectively, can be saturated or unsaturated. The isomeric 5-oxazolones are... [Pg.130]

Saturated 5(4ii)-Oxazolones (2-Oxazolin-5-ones) 7.3.2.5. Other Ring-Opening Reactions... [Pg.191]


See other pages where 3- Oxazoline-5-ones is mentioned: [Pg.729]    [Pg.75]    [Pg.214]    [Pg.255]    [Pg.255]    [Pg.129]    [Pg.130]    [Pg.130]    [Pg.130]    [Pg.151]    [Pg.151]    [Pg.153]    [Pg.155]    [Pg.157]    [Pg.159]    [Pg.161]    [Pg.163]    [Pg.165]    [Pg.167]    [Pg.169]    [Pg.171]    [Pg.173]    [Pg.175]    [Pg.177]    [Pg.179]    [Pg.181]    [Pg.183]    [Pg.185]    [Pg.187]    [Pg.189]    [Pg.193]    [Pg.195]    [Pg.197]    [Pg.199]    [Pg.201]    [Pg.203]   
See also in sourсe #XX -- [ Pg.223 ]

See also in sourсe #XX -- [ Pg.223 ]




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2- Oxazolin-5-ones reduction

2- Oxazolin-5-ones sodium borohydride

2- Oxazolin-5-ones stereochemistry

2- Oxazolin-5-ones—continued

2-Alkenyl-2-oxazoline-5-ones

2-Allyl-3-oxazoline-5-ones

2-Oxazolin-4-ones

2-Oxazolin-4-ones

2-Oxazolin-4-ones reactions

2-Oxazolin-4-ones synthesis

2-Oxazoline-5-ones Nucleophilic reactions

2-Oxazoline-5-ones ring opening reactions

2-Phenyl-2-oxazolin-5-one

2-Phenyl-2-oxazolin-5-ones, alkylation

3- Methyl-4-oxazolin-2-ones

3- Oxazolin-5-ones, 2-arylidene derivatives

3- Oxazolin-5-ones, 2-arylidene derivatives 2-benzylidene-4-methyl

3- Oxazolin-5-ones, 2-arylidene derivatives bond rupture

3- Oxazolin-5-ones, 2-arylidene derivatives conjugate addition

3- Oxazolin-5-ones, 2-arylidene derivatives hydrogenation

3- Oxazolin-5-ones, 2-arylidene derivatives quinoxalines from

3- Oxazolin-5-ones, 2-arylidene derivatives ring-opening

3- Oxazolin-5-ones, thermolysis

4- Oxazolin-2-ones, preparation

4- Oxazolin-2-ones, preparation reactions

4-Isopropyl-2-oxazolin-5-one

Oxazolin-2-ones, tautomerism

Oxazolin-4-ones cycloadditions

Oxazolin-5-onee

Oxazolin-5-onee

Oxazolin-5-ones, formation

Oxazolones (3-Oxazolin-2-ones)

Quinoxaline preparation from 3-oxazolin-5-ones

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