• Thumbnail for Chiral auxiliary
    In stereochemistry, a chiral auxiliary is a stereogenic group or unit that is temporarily incorporated into an organic compound in order to control the...
    34 KB (3,692 words) - 20:40, 22 July 2024
  • Thumbnail for Aldol reaction
    temporarily appending a chiral oxazolidinone auxiliary to create a chiral enolate. The pre-existing chirality from the auxiliary is then transferred to...
    38 KB (4,019 words) - 12:38, 16 November 2024
  • Thumbnail for Enantioselective synthesis
    BINAP/diamine-Ru, widens the scope to α,β-alkenes and aromatic chemicals. A chiral auxiliary is an organic compound which couples to the starting material to form...
    41 KB (4,726 words) - 05:21, 27 May 2024
  • Thumbnail for Chiral derivatizing agent
    chemistry, a chiral derivatizing agent (CDA), also known as a chiral resolving reagent, is a derivatization reagent that is a chiral auxiliary used to convert...
    15 KB (1,818 words) - 23:00, 4 December 2023
  • Thumbnail for Enantiomer
    encompassed include the use of chiral starting materials (chiral pool synthesis), the use of chiral auxiliaries and chiral catalysts, and the application...
    24 KB (2,632 words) - 01:30, 4 November 2024
  • before aza-MBH ring closure catalyzed by a chiral amine base. Oppolzer's sultam can be used as a chiral auxiliary for an asymmetric MBH reaction. When an...
    24 KB (2,824 words) - 23:32, 20 November 2024
  • Thumbnail for Asymmetric induction
    called chiral auxiliaries. In external asymmetric induction chiral information is introduced in the transition state through a catalyst of chiral ligand...
    29 KB (3,680 words) - 11:33, 19 September 2024
  • reaction. The chiral information is introduced by chiral auxiliaries from the diazo compound. In 2010, the Feng group developed a chiral Sc-catalyzed enantioselective...
    9 KB (1,021 words) - 22:19, 27 September 2024
  • Thumbnail for Tert-Butanesulfinamide
    commercially available and are used in asymmetric synthesis as chiral auxiliaries, often as chiral ammonia equivalents for the synthesis of amines. tert-Butanesulfinamide...
    7 KB (440 words) - 14:39, 27 October 2023
  • Thumbnail for Enders SAMP/RAMP hydrazone-alkylation reaction
    carbon-carbon bond formation reaction facilitated by pyrrolidine chiral auxiliaries. It was pioneered by E. J. Corey and Dieter Enders in 1976, and was...
    23 KB (2,515 words) - 20:33, 22 July 2024
  • performed in the presence of a chiral auxiliary. The selection of dihydroquinidine (DHQD) or dihydroquinine (DHQ) as a chiral auxiliary dictates the facial selectivity...
    17 KB (1,857 words) - 20:08, 5 November 2024
  • replacing ammonia with (S)-alpha-phenylethylamine as chiral auxiliary the ultimate reaction product was chiral alanine. Catalytic asymmetric Strecker reaction...
    10 KB (1,069 words) - 19:12, 26 September 2024
  • Thumbnail for Atorvastatin
    followed by chiral chromatographic separation of the enantiomers. An early enantioselective route to atorvastatin made use of an ester chiral auxiliary to set...
    100 KB (9,454 words) - 15:22, 12 November 2024
  • Thumbnail for Acetal
    of modified sugars. Acetals also find application as chiral auxiliaries. Indeed acetals of chiral glycols like, e.g. derivatives of tartaric acid can be...
    9 KB (1,122 words) - 00:44, 4 November 2024
  • placement of a chiral auxiliary on the starting material whose configuration is unaffected by the reaction, and the use of a chiral base. The relative...
    13 KB (1,449 words) - 18:59, 23 January 2024
  • Thumbnail for Hydrazone
    alkylated by alkyl halides. The hydrazines SAMP and RAMP function as chiral auxiliary. Several methods are known to recover carbonyl compounds from N,N-dialkylhydrazones...
    11 KB (1,154 words) - 13:23, 20 October 2024
  • (RAMP), a class of protein (R)-1-amino-2-methoxymethylpyrrolidine, a chiral auxiliary used in the Enders SAMP/RAMP hydrazone-alkylation reaction Airport...
    2 KB (332 words) - 02:22, 26 August 2024
  • by use of a chiral auxiliary, and the Nazarov reaction has been performed catalytically using chiral Lewis acids, Brønsted acids and chiral amines. IUPAC...
    11 KB (1,269 words) - 03:10, 14 October 2024
  • The chiral pool is a "collection of abundant enantiopure building blocks provided by nature" used in synthesis. In other words, a chiral pool would be...
    5 KB (515 words) - 11:57, 6 September 2023
  • Thumbnail for Camphorsultam
    known as bornanesultam, is a crystalline solid primarily used as a chiral auxiliary in the synthesis of other chemicals with a specific desired stereoselectivity...
    7 KB (638 words) - 02:38, 23 October 2024
  • Thumbnail for Menthol
    process is that D-menthol becomes inexpensively available for use as a chiral auxiliary, along with the more usual L-antipode. Menthol is included in many...
    31 KB (2,954 words) - 22:15, 11 November 2024
  • Thumbnail for Sulfonamide
    as a chiral auxiliary in organic synthesis. The related sulfinamides (R(S=O)NHR) are amides of sulfinic acids (R(S=O)OH) (see sulfinyl). Chiral sulfinamides...
    8 KB (847 words) - 18:55, 12 March 2024
  • that end, several variations have been developed utilizing chiral auxiliaries and chiral catalysts. Diastereoselective cyclizations are also known, in...
    25 KB (2,696 words) - 17:44, 11 September 2024
  • is used in broad variety of chemical reactions as chiral ligand, chiral catalyst or chiral auxiliary reagent in the Hajos–Parrish–Eder–Sauer–Wiechert reaction...
    4 KB (224 words) - 19:05, 8 March 2022
  • synthesis of chiral amino acids. The method was established in 1981 by Ulrich Schöllkopf. In it glycine is a substrate, valine a chiral auxiliary and the reaction...
    4 KB (444 words) - 19:38, 27 October 2022
  • to provide the crucial chiral environment. The strategy is to make these variables to interact with a chiral auxiliary (chiral selector, CS) whereby it...
    63 KB (6,792 words) - 22:07, 2 December 2023
  • Thumbnail for Idarubicin
    directed towards anthracyclinone syntheses: The use of d-glucose as a chiral auxiliary in asymmetric Diels–Alder reactions". J. Saudi Chem. Soc. 17: 29–42...
    5 KB (290 words) - 20:59, 6 January 2024
  • Thumbnail for Ojima lactam
    organic synthesis is an illustration of asymmetric synthesis via a chiral auxiliary. The reaction centers around an imine - lithium enolate cycloaddition...
    2 KB (267 words) - 13:39, 26 August 2024
  • situ from K2OsO2(OH)4 (an Os(VI) species) due to safety concerns. Chiral Auxiliary: This is usually some kind of cinchona alkaloid. Stoichiometric Oxidant:...
    20 KB (2,189 words) - 00:23, 15 July 2024
  • Thumbnail for Ephedrine
    In chemical synthesis, ephedrine is used in bulk quantities as a chiral auxiliary group. In saquinavir synthesis, the half-acid is resolved as its salt...
    66 KB (6,171 words) - 19:40, 17 November 2024