Aliphatic or alicyclic monoketones or alicyclic diketones of formula (I): R
1
—C(═O)—R
2
, wherein R
1
is a linear or branched C
1-10
-alkyl group and R
2
is a linear or branched C
1-10
-alkyl group or a phenyl group, or R
1
and R
2
together are —(CH
2
)
m
—[C(═O)]
n
—(CH
2
)
p
—, wherein m and p independently are integers from 1 to 4 and n is 0 or 1, thus forming an alicyclic ring together with the carbonyl group of (I), are produced by oxidizing an alcohol of formula (II): R
1′
—CHOH—R
2′
, in which R
1′
and R
2′
either have the same meaning as R
1
and R
2
above or, if R
1
and R
2
together are —(CH
2
)
m
—[C(═O]
n
—(CH
2
)
p
—, are together —(CH
2
)
m
—(CHOH)
n
—(CH
2
)
p
— wherein m, n and p are as defined above, with a peroxy compound in the presence of a carboxylic acid and a manganese(IV) complex of 1,4,7-trimethyl-1,4,7-triazacyclononane.
式 (I) 的脂肪族或脂环族单酮或脂环族二酮:R
1
-C(═O)-R
2
其中 R
1
是线性或支链 C
1-10
-烷基和 R
2
是直链或支链 C
1-10
-烷基或苯基,或 R
1
和 R
2
共同为-(CH
2
)
m
-[C(═O)]
n
-(CH
2
)
p
-,其中 m 和 p 分别为 1 至 4 的整数,n 为 0 或 1,从而与 (I) 的羰基一起形成脂环,是通过氧化式 (II) 的醇产生的:R
1′
-CHOH-R
2′
其中 R
1′
和 R
2′
与 R
1
和 R
2
的含义相同,或者,如果 R
1
和 R
2
共同为-(CH
2
)
m
-[C(═O]
n
-(CH
2
)
p
-和-(CH
2
)
m
-(CHOH)
n
-(CH
2
)
p
- 其中 m、n 和 p 如上定义,在羧酸和 1,4,7-三甲基-1,4,7-三氮杂环壬烷的锰(IV)络合物存在下与过氧化合物反应。
EP1385812A1
申请人:——
公开号:EP1385812A1
公开(公告)日:2004-02-04
US7015358B2
申请人:——
公开号:US7015358B2
公开(公告)日:2006-03-21
[EN] PROCESS FOR THE PRODUCTION OF KETONES<br/>[FR] PROCEDE DE FABRICATION DE CETONES
申请人:LONZA AG
公开号:WO2002088063A1
公开(公告)日:2002-11-07
Aliphatic or alicyclic monoketones or alicyclic diketones of formula (I): R1-C(=O)-R2, wherein R1 is a linear or branched C¿1-10?-alkyl group and R?2¿ is a linear or branched C¿1-10?-alkyl group or a phenyl group, or R?1 and R2¿ together are -(CH¿2?)m-[C(=O)]n-(CH2)P-, wherein m and p independently are integers from 1 to 4 and n is 0 or 1, thus forming an alicyclic ring together with the carbonyl group of (I), are produced by oxidizing an alcohol of formula (II): R?1'-CHOH-R2'¿, in which R?1' and R2'¿ either have the same meaning as R?1 and R2¿ above or, if R?1 and R2¿ together are -(CH¿2?)m-[C(=O]n-(CH2)p-, are together -(CH2)m-(CHOH)n-(CH2)p- wherein m, n and p are as defined above, with a peroxy compound in the presence of a carboxylic acid and a manganese(IV) complex of 1,4,7-trimethyl-1,4,7-triazacyclononane.
Catalytic, Asymmetric Transannular Aldolizations: Total Synthesis of (+)-Hirsutene
作者:Carley L. Chandler、Benjamin List
DOI:10.1021/ja8024164
日期:2008.5.1
We report an asymmetric, catalytic transannular aldolization that provides polycyclic products useful for natural product synthesis. We found that a proline-derivative catalyzes the transannular aldol reaction of 1,4-cyclooctanediones to the corresponding cyclic beta-hydroxy ketones in good yields and with high enantioselectivities. The utility of our reaction has been demonstrated in a total synthesis