Synthesis 2018; 50(12): 2394-2406
DOI: 10.1055/s-0036-1591567
paper
© Georg Thieme Verlag Stuttgart · New York

Enantioselective Biginelli Reaction of Aliphatic Aldehydes Catalyzed by a Chiral Phosphoric Acid: A Key Step in the Synthesis of the Bicyclic Guanidine Core of Crambescin A and Batzelladine A

Yongbiao Guo*
Beijing Institute of Pharmaceutical Chemistry, No. 37, Center South Street, Yangfang Town, Changping District, Beijing 102205, P. R. of China   Email: van87120@126.com   Email: zou404@263.net
,
Zhenhua Gao
Beijing Institute of Pharmaceutical Chemistry, No. 37, Center South Street, Yangfang Town, Changping District, Beijing 102205, P. R. of China   Email: van87120@126.com   Email: zou404@263.net
,
Chongxu Fan
Beijing Institute of Pharmaceutical Chemistry, No. 37, Center South Street, Yangfang Town, Changping District, Beijing 102205, P. R. of China   Email: van87120@126.com   Email: zou404@263.net
,
Jisheng Chen
Beijing Institute of Pharmaceutical Chemistry, No. 37, Center South Street, Yangfang Town, Changping District, Beijing 102205, P. R. of China   Email: van87120@126.com   Email: zou404@263.net
,
Junchen Li
Beijing Institute of Pharmaceutical Chemistry, No. 37, Center South Street, Yangfang Town, Changping District, Beijing 102205, P. R. of China   Email: van87120@126.com   Email: zou404@263.net
,
Yongpeng Huang
Beijing Institute of Pharmaceutical Chemistry, No. 37, Center South Street, Yangfang Town, Changping District, Beijing 102205, P. R. of China   Email: van87120@126.com   Email: zou404@263.net
,
Guilan Huang
Beijing Institute of Pharmaceutical Chemistry, No. 37, Center South Street, Yangfang Town, Changping District, Beijing 102205, P. R. of China   Email: van87120@126.com   Email: zou404@263.net
,
Huilan Yu
Beijing Institute of Pharmaceutical Chemistry, No. 37, Center South Street, Yangfang Town, Changping District, Beijing 102205, P. R. of China   Email: van87120@126.com   Email: zou404@263.net
,
Chuanpin Zou*
Beijing Institute of Pharmaceutical Chemistry, No. 37, Center South Street, Yangfang Town, Changping District, Beijing 102205, P. R. of China   Email: van87120@126.com   Email: zou404@263.net
› Author Affiliations
Further Information

Publication History

Received: 17 February 2018

Accepted after revision: 19 March 2018

Publication Date:
25 April 2018 (online)


Abstract

An efficient chiral phosphoric acid catalyzed Biginelli reaction for the synthesis of optically pure 4-alkyl-3,4-dihydropyrimidin-2-(1H)-ones has been developed, with a wide range of the desired products being obtained in moderate to high yields with good to excellent enantioselectivities (up to >99% ee after one recrystallization). The synthetic utility of this reaction is illustrated in various aliphatic bicyclic guanidine compounds, which is applied in the formal synthesis of the bicyclic guanidine core of crambescin A and batzelladine A.

Supporting Information