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The molecular and crystal structures of gibberellin a 4 and gibberellin a 13 methyl esters

, : The molecular and crystal structures of gibberellin a 4 and gibberellin a 13 methyl esters. Journal of the Chemical Society Perkin Transactions I (7): 1922-1926

The X-ray structures of gibberellin A4 methyl ester and gibberellin A13 trimethyl ester [plant hormones] were determined. Ring A is flattened and the crowding of C(7) by C(18) and C(15) is greater in gibberellin A13 trimethyl ester than gibberellin A4.

Accession: 006719779

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Related references

Bearder J.R.; Kirkwood P.S.; Macmillan J., 1981: Allylic chlorination of gibberellin a 3 and gibberellin a 7 methyl esters and of gibberellin a 3 preparation of gibberellin a 5. A high-yield conversion of GA3 to GA5 isolated from Gibberella sp. is described. With thionyl chloride, GA3 methyl ester gives mainly 1.beta.-chlorogibberellin A5 methyl ester; the isomeric 3.alpha.-chloro-1-ene was the main product from the react...

Kutschabsky, L.; Reck, G.; Hoehne, E.; Voigt, B.; Adam, G., 1980: Photochemical reactions 35. topochemical and nontopochemical control in the crystalline state photo dimerization of a gibberellin enone crystal and molecular structure of 3 dehydro gibberellin a 3 methyl ester. The crystal and molecular structure of 3-dehydro gibberellin A3 methylester was determined by X-ray analysis.

Murofushi N.; Yokota T.; Watanabe A.; Takahashi N., 1973: Isolation and characterization of gibberellins in calonyction aculeatum and structures of gibberellin a 30 gibberellin a 31 gibberellin a 33 and gibberellin a 34. Agricultural & Biological Chemistry 37(5): 1101-1113

Abouamer K.M.; Hanson J.R.; Hitchcock P.B., 1987: The stereochemistry of some reactions at c 16 in gibberellins an x ray crystallographic study of the methyl esters of gibberellin a 2 and gibberellin a 9 hydrochloride. Hydration of the 16-ene in the gibberellins is shown, by a combination of spectroscopic and X-ray crystallographic means, to lead to (16R)-alcohols. The hydrochloride of gibberellin A9 methyl ester possesses the same (16R)-stereochemistry.

Node M.; Hori H.; Fujita E., 1975: Syntheses of methyl esters of gibberellin a 15 and gibberellin a 37. Journal of the Chemical Society Chemical Communications (21): 898-899

Graebe J.E.; Hedden P.; Gaskin P.; Macmillan J., 1974: Biosynthesis of gibberellin a 12 gibberellin a 15 gibberellin a 24 gibberellin a 36 and gibberellin a 37 by a cell free system from cucurbita maxima. Phytochemistry (Oxford) 13(8): 1433-1440

Bearder J.R.; Macmillan J., 1973: Fungal products part 9 gibberellin a 16 gibberellin a 36 gibberellin a 37 gibberellin a 41 and gibberellin a 42 from gibberella fujikuroi. Journal of the Chemical Society Perkin Transactions I 22: 2824-2830

Fukui, H.; Nemori, R.; Koshimizu, K.; Yamazaki, Y., 1977: Structures of gibberellin a 39 gibberellin a 48 gibberellin a 49 and a new kaurenolide in cucurbita pepo. The structures of 3 new gibberellins A39, A48 and A49, and a new kaurenolide, isolated from seeds of C. pepo L., were elucidated. The structures of GA39, GA48 and GA49 were shown to be ent-3.alpha.,12.beta.-dihydroxygibberell-16-ene-7,19,20-trioic...

Voigt, B.; Adam, G., 1983: Gibberellins 89. synthesis of gibberellin a 55 and gibberellin a 57 as well as 1 oxygenated gibberellin a 5 and gibberellin a 20 analogs a new principle for the regioselective transposition of an allylic alcohol function. The synthesis of a series of 1-oxygenated gibberellins starting from GA3 is described. Nucleophilic addition of hydrazoic acid to 3-dehydro GA3 was followed by NaBH4 reduction of the resulting 1-azido-3-ketones 4 and 5 to the corresponding azido a...

Bianco J.; Bulard C., 1981: Influence of light treatment on gibberellin gibberellin a 4 gibberellin a 7 and gibberellin a 9 content of lactuca sativa cultivar grand rapids achenes. Free and bound GA A4, A7 and A9 were studied in L. sativa L. cv. Grand Rapids achenes either maintained in darkness or induced to germinate under different light treatment. The amount of GA in the achenes maintained in darkness was low. Short irra...