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href="#ulink_f4d59cc0-c688-5698-880a-c1f87db5aca7">Figure 2.8. Silylium binaphthyl‐allyl‐tetrasulfonate anion intermediate.Scheme 2.34. Diels‐Alder reaction between simple ester and cyclopentadiene c...Scheme 2.35. Diels–Alder reaction between cyclopentadien and enals (a), and ...Scheme 2.36. Redox‐divergent Diels‐Alde reaction leading to dihydronaphthale...Scheme 2.37. Diels‐Alder reaction promoted by Lewis acid‐assisted Brønsted a...Figure 2.9. Lewis acid‐assisted chiral Brønsted acid.Scheme 2.38. Povarov reaction with N‐2‐hydroxyphenyl imine (a) () and N‐...Figure 2.10. Transition state model of the aza‐Diels‐Alder reaction.Scheme 2.39. Intramolecular Povarov reaction of azadiene.Scheme 2.40. Povarov reaction leading to tetrahydroquinoline with two quater...Scheme 2.41. Hetero‐Diels‐Alder reaction between azopyridine carboxylate and...Scheme 2.42. Addition of enamides to ortho‐quinone methide.Scheme 2.43. Cycloaddition reaction between styrenes and aldimines.Figure 2.11. 3 : 1 : 4 Aqua complex of (R)‐8d/Mg/K.Scheme 2.44. [4+2] cycloaddition reaction between vinyl azides and N‐acyl im...Scheme 2.45. Inverse electron‐demand oxa‐Diels‐Alder reaction of ortho‐quino...Scheme 2.46. Enantioselective synthesis of 4‐aryl‐4H‐chromenes.Scheme 2.47. Synergistic rhodium/phosphoric acid catalysis.Scheme 2.48. 1,3‐Dipolar cycloaddition reaction between azomethine ylide and...Scheme 2.49. [3+2] Cycloaddition reaction of isatin‐derived 3‐indolylmethano...Scheme 2.50. Generation of the indolenium ion intermediate.Scheme 2.51. [4+3] Cycloaddition reaction of indolyl alcohol.Scheme 2.52. [3+2] Cycloaddition of 2‐indolylmethanols.Scheme 2.53. [3+3] Cycloaddition of 2‐indolylmethanols.Scheme 2.54. [4+3] Cycloannulation reaction between ortho‐quinone methides a...Scheme 2.55. [4+3] Cycloaddition reaction between furans and oxa‐allyl catio...Scheme 2.56. Nazarov reaction of acyclic divinyl ketones.Scheme 2.57. Nazarov‐type electrocyclization.Scheme 2.58. Tandem Nazarov cyclization semipinacol rearrangement reaction....Scheme 2.59. Michael reaction cyclohexanone and enone (a) and enol catalysis...Scheme 2.60. Aza‐Michael‐addition reactions of pyrazoles.Scheme 2.61. Sulfa‐Michael reaction to nitroalkenes.Scheme 2.62. Friedel‐Crafts alkylation reaction between indole and nitroalke...Scheme 2.63. Friedel‐Crafts alkylation reaction between nitrostyrenes and py...Scheme 2.64. Transfer hydrogenation of ketimines by Hantzsch ester.Figure 2.12. Results of the transfer hydrogenation of ketimines.Figure 2.13. Transition state of the transfer hydrogenation with Hantzsch es...Scheme 2.65. Transfer hydrogenation of benzoxazine using DHPD.Scheme 2.66. Metal‐Brønsted acid cooperative catalysis.Scheme 2.67. Transfer hydrogenation of N‐alkyl ketimines (a) (), reducti...Figure 2.14. Transfer hydrogenation of ketimines by benzothiazoline.Figure 2.15. Results of the transfer hydrogenation of ketimines by benzothia...Figure 2.16. Transition state of the transfer hydrogenation with Hantzsch es...Scheme 2.68. Transfer hydrogenation using indoline as a hydrogen donor (a) (...Scheme 2.69. Reduction of ketones by the combined use of catecholborane.Scheme 2.70. Transfer hydrogenation of chalcone derivatives.Scheme 2.71. Reduction of indolines.Scheme 2.72. Transfer hydrogenation of 1,1‐diarylethenes.Scheme 2.73. Asymmetric spiroacetalization by confined Brønsted acid.Scheme 2.74. Asymmetric spiroacetalization by TRIP.Scheme 2.75. Intramolecular hydroamination of alkenes (a) (), and its ap...Scheme 2.76. Hydroarylation of 1,1‐diarylethenes.Scheme 2.77. Bromocyclization of polyenes.Scheme 2.78. Intramolecular hydroalkoxylation of unactivated alkenes (a) [16...Scheme 2.79. Construction of all‐carbon quaternary stereocenters from indole...Scheme 2.80. Construction of triarylpyrrolylmethanes (a) and diarylindolylpy...Scheme 2.81. Ring expansion reaction of 1,3‐dithianes.Scheme 2.82. Vinylogous Wagner‐Meerwein shift.Scheme 2.83. House‐Meinwald rearrangement.Scheme 2.84. Construction of quaternary stereocenters by Pinacol rearrangeme...Scheme 2.85. Ring‐opening of meso‐aziridines.Scheme 2.86. Enantioselective oxidation of sulfides to sulfoxides.Scheme 2.87. Kinetic resolution of oxiranes
