“…Cyclopropanes are important building blocks in organic synthesis (Sohn and Bode, 2006 ; Bode and Sohn, 2007 ; Li et al, 2009 ; Lv et al, 2011 ; Sparr and Gilmour, 2011 ; Halskov et al, 2015 ; Sanchez-Diez et al, 2016 ; Blom et al, 2017 ; Apel et al, 2019 ). Especially, the cyclopropanes bearing both an electron-donating and an electron-withdrawing group on their cyclic structures, which are commonly named as Donor-Acceptor (D-A) cyclopropanes (Danishefsky, 1979 ; Wenkert, 1980 ; Reissig and Zimmer, 2003 ; Carson and Kerr, 2009 ; Cavitt et al, 2014 ; Nanteuil et al, 2014 ; Schneider et al, 2014 ; Grover et al, 2015 ; Talukdar et al, 2016 ; Wang and Tang, 2016 ; Werz and Biju, 2019 ), have been extensively studied in the construction of various functional molecules. D-A Cyclopropanes are conventionally activated by transition metal catalysts (Nanteuil et al, 2014 ), Lewis acids (Reissig and Zimmer, 2003 ; Carson and Kerr, 2009 ; Cavitt et al, 2014 ; Schneider et al, 2014 ; Grover et al, 2015 ; Talukdar et al, 2016 ; Wang and Tang, 2016 ; Werz and Biju, 2019 ) or amine-based organic catalysts (Halskov et al, 2015 ; Sanchez-Diez et al, 2016 ; Blom et al, 2017 ) ( Figure 2a ).…”