Compounds of the present invention are represented by the formula, ##STR1## wherein X represents a lower alkyl, lower alkoxy, lower haloalkyl or lower haloalkoxy group or a halogen atom, and R.sup.1 and R.sup.2, which may be the same or different, represent a hydrogen atom or a methyl group. They are useful intermediates for preparing herbicidal compounds.
Palladium-catalyzed synthesis of 3-oxo-1,3-dihydro-1-isobenzofuranyl alkanoates from 2-bromobenzaldehyde and sodium alkanoates
作者:Chan Sik Cho、Dong Yeol Baek、Sang Chul Shim
DOI:10.1002/jhet.5570360145
日期:1999.1
2-Bromobenzaldehyde reacts with sodiumalkanoates in acetonitrile under carbon monoxide pressure in the presence of a catalytic amount of bis(triphenylphosphine)palladium(II) chloride to afford the corre sponding 3-oxo-1,3-dihydro-1-isobenzofuranylalkanoates in moderate to good yields.
Compounds of the present invention are represented by the formula, ##STR1## wherein X represents a lower alkyl, lower alkoxy, lower haloalkyl or lower haloalkoxy group or a halogen atom, and R.sup.1 and R.sup.2, which may be the same or different, represent a hydrogen atom or a methyl group. They are useful intermediates for preparing herbicidal compounds.
Double ester of 16.beta.-ethylestran-17.beta.-ol derivatives
申请人:Takeda Chemical Industries, Ltd.
公开号:US04609650A1
公开(公告)日:1986-09-02
A novel steroid compound of the formula ##STR1## wherein A is a lower alkylene group; ##STR2## is an acyl group; and is a single bond or a double bond, and methods of producing the compound (I) as follows: ##STR3## and a pharmaceutical composition containing the compound (I). The compound (I) exhibits excellent antiandrogenic activity on oral administration and can be used for the treatment of prostatic hypertrophy.
Alkylations using methyltrialkoxyphosphonium tetrafluoborate salts. Synthetic and mechanistic aspects of methyl, ethyl, 2-propyl, and 2-octyl group transfers