Figure 8: Total synthesis of 29.
From: Biomimetically inspired asymmetric total synthesis of (+)-19-dehydroxyl arisandilactone A

(a) 28 (3.0 eq), BF3·OEt2 (3.3 eq), DCM, −78 to −35 °C, 66%.
From: Biomimetically inspired asymmetric total synthesis of (+)-19-dehydroxyl arisandilactone A
(a) 28 (3.0 eq), BF3·OEt2 (3.3 eq), DCM, −78 to −35 °C, 66%.