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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...

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