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Beilstein J. Org. Chem. 2022, 18, 1471–1478, doi:10.3762/bjoc.18.154
Graphical Abstract
Figure 1: Chiral phosphorus acids (CPAs) derived from BINOL, VAPOL, and SPINOL. R = H, Ph, 4-PhC6H4-, 4-β-nap...
Scheme 1: The thiolic/thionic tautomeric equilibrium in thiophosphorus acids.
Figure 2: Project strategy and requirements for C1-symmetrical CPAs.
Figure 3: BINOL CPA and C1-symmetrical CPA targets 1–4.
Scheme 2: Synthesis of tryptophol-derived thiophosphorus acid 1.
Scheme 3: Synthesis of indole-derived thiophosphorus acid 2.
Scheme 4: Synthesis of N-biphenyl-DOPO CPA 4.
Scheme 5: Transfer hydrogenation of 2-phenylquinoline and transition-state proposed by Guinchard and coworker...
Beilstein J. Org. Chem. 2014, 10, 732–740, doi:10.3762/bjoc.10.67
Scheme 1: McCormack synthesis.
Scheme 2: Ring-closing metathesis.
Scheme 3: Phospha-Dieckmann condensation.
Scheme 4: Palladium-catalyzed oxidative arylation.
Scheme 5: Tandem cross-coupling/Dieckmann condensation.
Scheme 6: Rhodium-catalyzed double [2 + 2 + 2] cycloaddition.
Scheme 7: Silver oxide-mediated alkyne–arene annulation.
Scheme 8: Silver acetate-mediated alkyne–arene annulation.
Scheme 9: Cyclization through phosphinylation/alkylation of malonate anion.
Scheme 10: Tandem hydrophosphinylation/Michael/Michael reaction of allenyl-H-phosphinates.
Scheme 11: 5-Membered “cyclo-PALA” via intramolecular Mitsunobu reaction.
Scheme 12: 6-Membered “cyclo-PALA” via intramolecular Mitsunobu reaction.
Scheme 13: Intramolecular Kabachnik–Fields reaction.
Scheme 14: Tandem Kabachnik–Fields/alkylation reaction.
Scheme 15: Tandem Kabacknik–Fields/C–N cross-coupling reaction.
Scheme 16: Tandem Kabacknik–Fields/C-P cross-coupling reaction.
Scheme 17: Heterocyclization via amide formation.
Scheme 18: Cyclization via reductive amination.
Scheme 19: H-Phosphinate alkylation.
Scheme 20: Cyclization through intramolecular Michael addition.
Scheme 21: Double Arbuzov reaction of bis(trimethylsiloxy)phosphine.
Scheme 22: Diastereoselective ring-closing metathesis.
Scheme 23: 2-Ketophosphonate/benzene annulation.
Scheme 24: Tandem Kabachnik–Fields/transesterification reaction.
Scheme 25: Tandem Kabachnik–Fields/transesterification reaction with oxazolidine.