作者:Yan-Ping Li、Liao-Bin Dong、Duo-Zhi Chen、Hong-Mei Li、Jin-Dong Zhong、Fei Li、Xing Liu、Bei Wang、Rong-Tao Li
DOI:10.1016/j.phytol.2013.03.009
日期:2013.5
(7S,8R,7'S)-9,7',9'-Trihydroxy-3,4-methylenedioxy-3'-methoxy[7-O-4',8-5']neolignan (1) and (7S,8R,7'S)-9,'0-dihydroxy-3,4-methylenedioxy-3',7'-dimethoxy [7-O-4',8-5'] neolignan (2), two new natural dihydrobenzofuran-type neolignans, along with 9,9'-dihydroxy-3,4-methylenedioxy-3'-methoxy [7-O-4',8-5'] neolignan (3) and (-)-machicendiol (4), were isolated from the whole plants of Breynia fruticosa. The structures of 1 and 2, including the absolute configurations, were determined by spectroscopic methods and circular dichroism (CD) techniques. The absolute configuration of 4 was confirmed by calculations of the OR spectrum, together with OR and ECD spectra of its p-bromobenzoate ester (4a). (C) 2013 Phytochemical Society of Europe. Published by Elsevier B. V. All rights reserved.
(7S,8R,7'S)-9,7',9'-三羟基-3,4-亚甲二氧基-3'-甲氧基[7-O-4',8-5']新木脂素(1)和(7S,8R,7'S)-9',0-二羟基-3,4-亚甲二氧基-3',7'-二甲氧基[7-O-4',8-5']新木脂素(2),两种新的天然二氢苯并呋喃型新木脂素,连同9,9'-二羟基-3,4-亚甲二氧基-3'-甲氧基[7-O-4',8-5']新木脂素(3)和(-)-马钱酚(4),从油柑(Breynia fruticosa)全株中分离出来。1和2的结构,包括绝对构型,通过光谱方法和圆二色光谱(CD)技术确定。4的绝对构型通过计算其OR光谱以及与其对位溴苯甲酸酯(4a)的OR和ECD光谱相结合来确认。(C) 2013 欧洲植物化学学会。由爱思唯尔B.V.出版。保留所有权利。