Synthesis 2018; 50(10): 2058-2066
DOI: 10.1055/s-0037-1609343
paper
© Georg Thieme Verlag Stuttgart · New York

Stereoselective Allylation of Linear and Chiral β-Amino-α-Hydroxy Aldehydes: Total Syntheses of Tetraacetyl d-lyxo-, d-ribo-, and d-arabino-Phytosphingosines

In-Soo Myeong
School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Suwon-si, Gyeonggi-do 16419, Republic of Korea   Email: whham@skku.edu
,
Jin-Seok Kim
School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Suwon-si, Gyeonggi-do 16419, Republic of Korea   Email: whham@skku.edu
,
Muyng-Gyu Park
School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Suwon-si, Gyeonggi-do 16419, Republic of Korea   Email: whham@skku.edu
,
Hwan-Hee Jeon
School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Suwon-si, Gyeonggi-do 16419, Republic of Korea   Email: whham@skku.edu
,
Changyoung Jung
School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Suwon-si, Gyeonggi-do 16419, Republic of Korea   Email: whham@skku.edu
,
Yong-Taek Lee
School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Suwon-si, Gyeonggi-do 16419, Republic of Korea   Email: whham@skku.edu
,
Won-Hun Ham*
School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Suwon-si, Gyeonggi-do 16419, Republic of Korea   Email: whham@skku.edu
› Author Affiliations
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Publication History

Received: 02 February 2018

Accepted after revision: 20 February 2018

Publication Date:
27 March 2018 (online)


Abstract

The stereoselective allylations of β-amino-α-hydroxy aldehydes­ are described. Several Lewis acids (BF3·OEt2, SnCl4, TiCl4, ZnCl, and MgBr2·OEt2) were utilized in the allylations. The allylation of anti-β-NHCbz-α-OTBS substrate mediated by SnCl4 afforded the syn-selective­ product, while its allylation mediated by BF3·OEt2 afforded the anti-selective product. The allylation of syn-β-NHCbz-α-OTBS mediated by SnCl4 afforded the anti-selective product. The mechanism involves the chelation between the amido group and aldehyde oxygen by SnCl4, and the Felkin–Anh model by BF3·OEt2. The resulting allylation products were used for the total syntheses of tetraacetyl d-lyxo-, d-ribo-, and d-arabino-phytosphingosines.

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