The IR spectra of 47 1,3,2-dioxaphosphorinanes, mostly new compounds, have been recorded and discussed. Assignments have been made to PO, POC (alkyl and aryl), PS and PN stretching motions. In addition,it is suggested tentatively that multiple bands found at around 1000 to 1050 cm−1 and at around 1150 to 1200 cm−1 may be due to ring PO(C) vibrations.
记录和讨论了47种1,3,2-二氧杂磷酰萘啉(主要是新化合物)的红外光谱。分配给P,O,POC(烷基和芳基),PS和PN拉伸运动。另外,初步建议在大约1000至1050 cm -1和大约1150至1200 cm -1处发现多个频带可能是由于环PO(C)振动所致。
Synthesis of Some Amino Acid Linked Nitrogen Mustard Derivatives
作者:Christopher Mcguigan、Padma Narashiman
DOI:10.1055/s-1993-25855
日期:——
Dichlorophosphoramide is readily prepared by the reaction of bis(ß-chloroethyl)amine hydrochloride with phosphoryl chloride at elevated temperature. The crude product is pure without need for troublesome vacuum distillation. However, this reagent reacts only poorly with ethanol, propanol, and the methyl ester of valine. Thus, an alternative route was sought to amino acid linked derivatives of nitrogen mustards. This involved the synthesis of the appropriate alkyl phosphorodichloridate, and its reaction with bis(ß-chloroethyl)amine, followed by condensation with an amino acid carboxyl ester. Reactions proceed in high yield, under mild conditions. In all but the case of glycine derivatives, the presence of multiple chiral centres in the final product leads to the generation of diastereoisomers, which can be observed by spectroscopic and analytical (HPLC) methods.
Condensation of alkyl allyl (and 3-methyl-3-butenyl) phosphorochloridates with dialkyl phosphates gave trialkyl allyl (and 3-methyl-3-butenyl) pyrophosphates. Reactions of crotyl (2-butenyl) pyrophosphates with various nucleophiles such as phenolic ethers, aromatic amines, and nitrogen-containing heterocycles in the presence of boron trifluoride etherate gave good to moderate yields of crotylated products. The
The Vilsmeier reagent derived from N-formylmorpholine produces chlorothioformates from primary and secondary alkyl xanthates. The major side products are the corresponding alkyl chlorides. Secondary alkyl chlorothioformates give lower yields due to their instability. Treating xanthates with other common chlorinating agents (oxalyl chloride, thionyl chloride) gives only dialkyl thiodicarbonates.
Novel retinoid derivatives and methods for producing said compounds and anti-cancer pharmaceutical composition comprising said compounds
申请人:——
公开号:US20030171339A1
公开(公告)日:2003-09-11
The present invention relates to a novel retinoid derivative compound represented by the formula I:
1
wherein X, R
1
, R
2
and R
3
are as defined herein or pharmaceutically acceptalbe salts thereof. Also, the present invention relates to processes for producing the compound of the formula I and to an anti-cancer composition comprising the compound of the formula I. The compound of the formula I according to the present invention exerts high anti-cancer effects while not causing undesirable side effects.