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18162-48-6872-50-4Methylene ChloridenaphthaleneTHFTitanium Dioxide
ChemicalBook CAS DataBase List PHYSOSTIGMINE

PHYSOSTIGMINE synthesis

10synthesis methods
2-Butenoic acid, 2-methyl-4-[[tris(1-methylethyl)silyl]oxy]-, (2Z)-

153109-50-3
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PHYSOSTIGMINE

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Yield:-

Steps:

Multi-step reaction with 6 steps
1: 55 percent / DCC, HOBT / tetrahydrofuran / Heating
2: 94 percent / Pd2(dba)3*CHCl3, (S)-BINAP, 1,2,2,6,6-pentamethylpiperidine / N,N-dimethyl-acetamide / 1.5 h / 100 °C
3: 80 percent / 3M aq. HCl / tetrahydrofuran / Ambient temperature
4: 1.) Et3N, MgSO4, 2.) LiAlH4 / 1.) THF, RT, overnight, 2.) THF, reflux, 1.5 h
5: BBr3 / CH2Cl2 / 23 °C
6: NaH / diethyl ether

References:

Matsuura, Takaharu;Overman, Larry E.;Poon, Daniel J. [Journal of the American Chemical Society,1998,vol. 120,# 26,p. 6500 - 6503]

METHYLISOCYANATE 1 X 500MG NEAT

624-83-9
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469-22-7 Synthesis
Eseroline

469-22-7
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References
2-Butenamide, N-(2-iodo-4-methoxyphenyl)-N,2-dimethyl-4-[[tris(1-methylethyl)silyl]oxy]-, (2Z)-

153109-51-4
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PHYSOSTIGMINE

57-47-6
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References
1H-Indole-3-acetaldehyde, 2,3-dihydro-5-methoxy-1,3-dimethyl-2-oxo-, (3S)-

153109-52-5
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PHYSOSTIGMINE

57-47-6
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References
2H-Indol-2-one, 1,3-dihydro-5-methoxy-1,3-dimethyl-3-[(1E)-2-[[tris(1-methylethyl)silyl]oxy]ethenyl]-, (3S)-

153109-54-7
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PHYSOSTIGMINE

57-47-6
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References

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