Chemoselective ring opening of benzoxazaphosphinines

Reddy, K. Krishna; Kumar, Manjeet; Reddy, M. Muralidhar; Reddy, C. Devendranath; Reddy, C. Suresh

doi:10.1016/j.tetlet.2008.08.069

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Cited by 11 publications

References 19 publications

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Synthesis and Antioxidant Activity of Substituted‐1,3,2‐Diazaphosphole 1‐Oxides

Naidu

Rao

Raju

et al. 2011

Archiv der Pharmazie

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Synthesis of 1-substituted-1,3,2-diazaphosphole 1-oxides (3a-l) were accomplished via a two-step process. It involves the preparation of diazaphospholo 1-oxide monochloride intermediate (2) and its subsequent reaction with phenols/amino acid esters in dry THF in the presence of triethylamine at 40-45°C. The structures of newly synthesized compounds were characterized by spectral and elemental analysis. The title compounds were evaluated for their in-vitro antioxidant properties.

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Synthesis and Antioxidant Activity of Substituted‐1,3,2‐Diazaphosphole 1‐Oxides

Naidu

Rao

Raju

et al. 2011

Archiv der Pharmazie

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ChemInform Abstract: Chemoselective Ring Opening of Benzoxazaphosphinines.

Reddy¹,

Kumar²,

Reddy³

et al. 2009

ChemInform

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Organo-phosphorus compounds S 0080Chemoselective Ring Opening of Benzoxazaphosphinines. -The easily prepared benzoxazaphosphinine-2-thione (II) reacts with heterocyclic amines followed by sodium salts of heterocyclic amines to give chemoselective ring-opening at the P-O bond yielding differently substituted tris-thiophosphoramides. -(REDDY, K. R. K. K.; KUMAR, M. A.; REDDY, M. V. N.; REDDY, C. D.; REDDY*, C. S.; Tetrahedron Lett. 49 (2008) 44, 6337-6340; Dep. Chem., Sri Venkateswara Univ., Tirupati 517 502, India; Eng.) -Mais 07-188

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Organocatalytic Enantioselective Synthesis of P‐Stereogenic Chiral Oxazaphospholidines

Wang

et al. 2016

Eur J Org Chem

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The enantioselective synthesis of P‐stereogenic chiral organophosphines under organocatalysis is a challenging research field, and reports that use this approach are rare. Herein, we have developed the enantioselective synthesis of P‐stereogenic chiral oxazaphospholidines by using a bicyclic thiazole as the organocatalyst in the P–N and P–O bond‐forming reaction. The P‐chiral products were prepared in high yields with moderate enantioselectivities. The base that was used in this process had a significant influence on the enantioselectivity of the reaction and in some cases led to the opposite configuration of the P‐chiral center.

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Chemoselective ring opening of benzoxazaphosphinines

Cited by 11 publications

References 19 publications

Synthesis and Antioxidant Activity of Substituted‐1,3,2‐Diazaphosphole 1‐Oxides

Synthesis and Antioxidant Activity of Substituted‐1,3,2‐Diazaphosphole 1‐Oxides

ChemInform Abstract: Chemoselective Ring Opening of Benzoxazaphosphinines.

Organocatalytic Enantioselective Synthesis of P‐Stereogenic Chiral Oxazaphospholidines

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