- Highly enantiomeric purity conversion of α-sulfinyl oximes and α-sulfinyl hydrazones to the corresponding β-keto sulfoxides with butyltriphenylphosphonium periodate (BUTPPPI)
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Butyltriphenylphosphonium periodate (Ph3P+BuIO 4-)1 is readily prepared as a white solid from butyltriphenylphosphonium chloride, performs conversion of α-sulfinyl oximes (2) and α-sulfinyl hydrazones (4) to the
- Hajipour,Ruoho
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p. 2653 - 2657
(2007/10/03)
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- Bis(1-benzyl-4-aza-1-azoniabicyclo[2.2.2]octane) persulfate: A mild and efficient oxidant for cleavage of oxime double bonds under anhydrous conditions
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Bis(1-benzyl-4-aza-1-azoniabicyclo[2.2.2]octane)persulfate (BAABCPS) 1 readily prepared as orange solid from commercially available 1,4- diazabicyclo[2.2.2]octane (DABCO) and potassium persulfate, converts oximes and α-sulfinyl oximes to the corresponding carbonyl compounds and β-keto sulfoxides respectively, the yields and enantiomeric purity are excellent.
- Hajipour,Mohammadpoor-Baltork,Kianfar
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p. 221 - 224
(2007/10/03)
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- An easy and efficient method for cleavage of carbon-nitrogen double bonds under non-aqueous and neutral conditions
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1-Benzyl-4-aza-1-azoniabicyclo[2.2.2]octane periodate (BAABCP) (1), readily prepared as an orange solid from commercially available DABCO (1,4- diazabicyclo [2.2.2]octane, performs oxidation in anhydrous conditions. Under these conditions, the reagent converts phenylhydrazones, p-phenylhydrazones, semicarbazones, and β-keto sulfoxide hydrazones to the corresponding carbonyl compounds and β-keto sulfoxides respectively, the yields and enantioselectivity are excellent.
- Hajipour,Mahboobkhah
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p. 3143 - 3149
(2007/10/03)
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- 1-Benzyl-4-aza-1-azoniabicyclo[2.2.2]octane Periodate: A Mild and Efficient Oxidant for the Cleavage of Oxime Double Bonds under Anhydrous Conditions
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1-Benzyl-4-aza-1-azoniabicyclo[2.2.2]octane periodate (BAABCP) (1), readily prepared from commercially available 1,4-diazabicyclo[2.2.2]octane (DABCO) and sodium periodate, converts oximes and α-sulfinyl oximes to the corresponding carbonyl compounds and β-keto sulfoxides, respectively, in high yields and high enantiomeric purity.
- Hajipour, Abdol Reza,Mahboubghah, Nasrien
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p. 122 - 123
(2007/10/03)
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- An Unexpected Rearrangement of a β-amino Sulfoxide under Pummerer Reaction Conditions
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Attempts to prepare the benzazepine ring system of the Rhoedine alkaloids using a Pummerer cyclization of the β-amino sulfoxide (16) gave instead the unexpected alcohol (19).The β-amino sulfoxide (16) was prepared via a diastereoselective reduction of the
- Pyne, Stephen G.,Hajipour, A. R.
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p. 13501 - 13510
(2007/10/02)
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