Sarsagenin → Spirostan-3-ol

HRID 1488892Notes

Reaction equation

[CH3:1][C@@H:2]1[CH2:30][O:29][C@@:5]2([O:9][C@H:8]3[CH2:10][C@H:11]4[C@@H:16]5[CH2:17][CH2:18][C@@H:19]6[CH2:24][C@@H:23]([OH:25])[CH2:22][CH2:21][C@:20]6([CH3:26])[C@H:15]5[CH2:14][CH2:13][C@:12]4([CH3:27])[C@H:7]3[C@@H:6]2[CH3:28])[CH2:4][CH2:3]1.C[C@H]1CO[C@@]2(O[C@H]3C[C@H]4[C@@H]5CC[C@H]6C[C@@H](O)CC[C@]6(C)[C@H]5CC[C@]4(C)[C@H]3[C@@H]2C)CC1>>[CH3:28][C@@H:6]1[C@:5]2([O:29][CH2:30][CH:2]([CH3:1])[CH2:3][CH2:4]2)[O:9][C@H:8]2[CH2:10][C@H:11]3[C@@H:16]4[CH2:17][CH2:18][CH:19]5[CH2:24][CH:23]([OH:25])[CH2:22][CH2:21][C@:20]5([CH3:26])[C@H:15]4[CH2:14][CH2:13][C@:12]3([CH3:27])[C@@H:7]12

Participants

Reactant 2

HCID 92095Sarsagenin

HCID 99516Tigogenin

Product 1

HCID 3035446Spirostan-3-ol

Procedure

Depending on its structure, a given saponin can have a particular biologic property and find use with the present formulation. A variety of structurally related saponins are known, the most variable structural feature being the glycosylation pattern. S. Budavari, ed., The Merck Index, 11th ed., Merck & Co., Inc., Rahway, N.J., 1990, p. 1328. Saponins also may contain additional modifications, such as the sarasaponins which are saponins with asteroid attached, and saponin structure can be modified by any number of enzymatic, chemical and/or mechanical means known in the art. Saponins from Yucca schidigera contain steroidal saponins with the major sapogenins being sarsapogenin and tigogenin. The sarsaponin yields on hydrolysis, sarsasapogenim (sarsasapogenim 5-beta, 20-betaF, 22-deltaF, 25-betaF; also known as spirostan-3-beta-01 and parigenin), glucose and galaetose. The sarasapogenim has a molecular formula of C27H44 O3. Nobel, Park S., Agaves, Oxford Univ. Press, New York, 1994. Accordingly, derivatives of these compounds which produce a formulation having the desired pest growth controlling properties are considered equivalents of the invention. Saponins have diverse activities which are attributable to the chemical make-up of a particular saponin and most typically are dependent on the source form which the saponin is derived. For example, saponins derived from Japanese Camilla control the growth of mosquito larvae. Saponins from sources other than Yucca plants can be used as active agents in insecticidal compositions. As appropriate, it is preferable to select a saponin that increases the pest growth controlling effect of a formulation as compared to a formulation that excludes the saponin.

Sources & evidence

ORD record: ord-66f1c59a51984cd1afc6d4558dc1b5b3
Source dataset: uspto-grants-1997_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05676958

Reaction notes

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