Tetrahydro-2-methylfurane

The first reports on enantioselective addition reactions of achiral organometallic reagents, modified by aprotic chiral additives, described the addition of Grignard reagents to prostereogenic carbonyl compounds in the presence of ( + )-(/ ,/J)-2,3-dimethoxybutane (l)4 5, (-)-tetrahydro-2-methylfuran (2)6, (-)-l-[(tetrahydro-2-furanyl)methyl]pyrrolidine (3)7 or (-)-sparteine (4)8. The enantioselectivity, however, was poor (0-22% ee). [Pg.147]

Tetrahydrofurfuralamine, t72 Tetrahydrolinalool, d668 Tetrahydro-2-methylfuran, m429... [Pg.317]

Irradiation of perylene in tetrahydro-2-methylfuran glass gave rise to an absorption at 580 nxn which was attributed to its positive ion61. [Pg.86]

FIGURE 8.6. Triplet absorption, singlet emission, and absorption (from left to right) of (from top to bottom) m-LPPP161 and hexaphenyl films 162 at 90 K, and para-quater-, and terphenyl at 77 K in tetrahydro-2-methylfuran.25... [Pg.212]

Barker and coworkers noted the rapid solvotysis of 4-O-benzyl-l-O-p-tolylsulfonyl-1,4-pentanediol in ethanol to give tetrahydro-2-methylfuran, benzyl ethyl ether, and p-toluenesulfonic acid, a reaction where the rate and products clearly indicate anchimerio assistance from the benzyloxy group by way of a five-membered, cychc, oxonium-ion intermediate. They extended their study to three pentitol derivatives, (14), (18), and (20) ... [Pg.114]

Furanone, dihydro-2-methyl-, tetrahydro-2-methylfuran-3-one, 2-methyl-3-oxotetrahydrofuran 3188-00-9] FEMA 3373... [Pg.237]

Solvent THF or tetrahydro-2-methylfurane observ ation of ion pairs. ) Numbering of substituent positions sec anthracene. ) Theoretical discussion of /i/-parameters, spin density calculations. t) No assignment of ft/-paramcters. ... [Pg.127]

When tetrahydro-2-methylfuran 71 was used, the product was (tetrahydro-2-methyl-2-furyl)-succinic anhydride 72. This suggests that the tertiary radical is the most favored species formed. The reactions were claimed to be specific for five-membered cyclic ethers since tetrahydropyran... [Pg.203]

Tetrahydro-2-furylsuccinic anhydride, MA-tetrahydrofuran adduct, 203 Tetrahydro-2-methyIfuran, MA radical adduct, 203 (Tetrahydro-2-methyl-2-furyl)succinic anhydride, MA-tetrahydro-2-methylfuran adduct, 203 Tetrahydronaphthalene, MA radical adduct, 198 l-(Tetrahydronaphthyl)succinic anhydride, MA-tetrahydronaphthlene adduct, 198 1,1,2,2-Tetrahydroperfluoroalkyl fumarate, grafting on polyethylene, 462 Tetrahydrophthalic anhydride MA copolymerization, 586 preparation, 15... [Pg.867]

Vapor-phase hydrogenation of 2-methylfuran over a nickel catalyst gave 2-methyltetrahydrofuran as the chief product (86% yield) at 100°C, but as the temperature was raised, the amount of the tetrahydro compound decreased with formation of increased amounts of 2-pentanone, which attained a maximum (75% yield) at about 185°C. Along with the ketone, a small amount of 2-pentanol was also formed.186... [Pg.548]

It has been demonstrated that the 4,5-dihydro-2-methylfuran, formed as an intermediate, hydrolyzes to 5-hydroxy-2-pentanone through the reaction sequence shown in Scheme 12.25.189,190,192 On the other hand, 5-hydroxy-2-pentanone was cyclodehy-drated to give 4,5-dihydro-2-methylfuran in yields of 86% or more in a continuous process in the presence of phosphoric acid (Scheme 12.25). Furan-2-carboxylic acid (2-furoic acid) was hydrogenated to the corresponding tetrahydro derivative in water over Skita s colloidal palladium at room temperature193 or over Raney Ni in ammo-niacal water at 130-150°C and 0.93 MPa H2 (eq. 12.99)194 or as its sodium salt in water at 110°C and 5.2 MPa H2.195... [Pg.548]

Figure 5.2.11. Cellulose pyrolysate obtained at 59(P C and separated on a methyl silicone with 5% phenyl silicone type column. 1 acetic anhydride, 2 pentanal, 3 2-hydroxybutanedialdehyde, 4 1,4-dioxadiene, 5 tetrahydro-2-furanmethanol, 6 2-(hydroxymethyl)-furan, 7 3-methyl-2-hexanone, 8 2-methoxy-2,3-dihydrofuran, 9 2(5H)-furanone, 10 1-acetyloxypropan-2-one, 11 hydroxycyclopentenone, 12 5-methylfurfural, 13 2,3-dihydro-5-methylfuran-2-one, 14 1-cyclopentylethanone, 15 2-hydroxy-3-methyl-2-cyclopenten-1-one, 16 3,5-dimethylcyclopentan-1,2-dione, 17 unknown, 18 3-ethyl-2,4(3H,5H)-furandione, 19 6-methyl-1,4-dioxaspiro[2,4]heptan-5-one, 20 1-hydroxy-3,6-dioxabicyclo[3.2.1]octan-2-one, 21 1,4 3,6-dianhydro-a-D-glucopyranose, 22 5-(hydroxymethyl)-furfural, 23 4-cyclopenten-1,2,3-triol, 24 5-ethyl-3-hydroxy-4-methyl-tetrahydrofuran-2-one, 25 levoglucosan, 26 1,6-anhydro-p-D-glucofuranose.

G.3) (G.3) 2(3//)-Furanone, dihydro-5-methyl-, pentano-4-lactone, tetrahydro-5-methylfuran-2-one, 4-pentanolide, 4-hydroxypentanoic acid lactone, "y-methyl-7-butyrolactone, y-pentalactone, 7-valerolactone [108-29-2] FEMA 3103 ( )- [57129-69-8] (R)- [58917-25-2] (S)- [19041-15-7]... [Pg.183]

Furanmethanol, 5-ethenyltetrahydro-a, a, 5-trimethyl-, (m)-, 2-(tetrahydro-t-5-methyl-5-vinyl-r-2-furyl)propan-2-ol, tetrahydro c-5-(l-hydroxy-l-methylethyl)-x-2-xinyl-2-methylfuran, cis-linalool oxide (5989-33-3) ( )-m- (128441-08-71 2R,cis- (4031-48-5J 25,m- (23007-29-6J no stereochemistry (60047-17-8J... [Pg.224]

Vitzthum and Werkhoff synthesized this new compound from 2-methylfuran (silvan 1.2), by action of bromine and methanol, then hydrogenation leading to tetrahydro-2,5-dimethoxy-2-methylfuran which then reacts with furfurylamine. [Pg.274]

C2 2H2 6O2 f 5-Allyl-5-methoxy-2-(3 ,4 ,5 -trimethoxyphenyl)-3-methyl-2,3,5,6-tetrahydro-6-oxobenzofuran, 43B, 418 C2 2H2 sOg, 5-Allyl-3a-methoxy-2-(3 ,4 ,5 -trimethoxyphenyl)-3-methyl-2,3,3a,6-tetrahydro-6-oxobenzofuran, 43B, 417 C2 2H28O3 r 7-t-Butyl-3-(5 - t-butyl-3 -methylfuran-2 -yl)-5-methylben-zofuran-2(3H)-one, 44B, 308... [Pg.170]

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