Chemical method of producing SMTP groups or SMTP-7 and intermediates used in the method

A method of producing a compound of formula (1), comprising a production step I,

• wherein the production step I is represented as:
• wherein:
• the eighth step is a step of obtaining a compound, which is represented by the formula (3), by oxidizing the compound represented by the formula (4a) with an oxidizing agent selected from the group consisting of osmium tetroxide (OsO4), cold alkaline potassium permanganate (KMnO4), and performic acid (HCO2OH),
• the ninth step is a step of obtaining the compound represented by the formula (2) by substituting the compound represented by the formula (3) with a protecting group, and
• the tenth step is a step of constructing a functional group X consisting of any one of COOH, CHO, and —CH═C(CH3)—(CH2)2—CH═C(CH3)2, and
• wherein
• Y1 and Y2 are each independently selected from the group consisting of trimethylsilyl, triethylsilyl (TES), triisopropylsilyl, t-butyldimethylsilyl, t-butyldiphenylsilyl or methyl, methoxymethyl, t-butyl, allyl, and benzyl.